| Port | TCP | UDP | Description | Status |
| 0 | UDP | Reserved | Official | |
| 1 | TCP | UDP | TCP Port Service Multiplexer (TCPMUX) | Official |
| 2 | TCP | UDP | CompressNET[2] Management Utility[3] | Official |
| 3 | TCP | UDP | CompressNET[2] Compression Process[4] | Official |
| 4 | TCP | UDP | Unassigned | Official |
| 5 | TCP | UDP | Remote Job Entry | Official |
| 7 | TCP | UDP | Echo Protocol | Official |
| 8 | TCP | UDP | Unassigned | Official |
| 9 | TCP | UDP | Discard Protocol | Official |
| 10 | TCP | UDP | Unassigned | Official |
| 11 | TCP | UDP | Active Users (systat service)[5][6] | Official |
| 12 | TCP | UDP | Unassigned | Official |
| 13 | TCP | UDP | Daytime Protocol (RFC 867) | Official |
| 14 | TCP | UDP | Unassigned | Official |
| 15 | TCP | UDP | Previously netstat service[5] | Unofficial |
| 16 | TCP | UDP | Unassigned | Official |
| 17 | TCP | UDP | Quote of the Day | Official |
| 18 | TCP | UDP | Message Send Protocol | Official |
| 19 | TCP | UDP | Character Generator Protocol (CHARGEN) | Official |
| 20 | TCP | UDP | FTP data transfer | Official |
| 21 | TCP | FTP control (command) | Official | |
| 22 | TCP | UDP | Secure Shell (SSH) — used for secure logins, file transfers (scp, sftp) and port forwarding | Official |
| 23 | TCP | UDP | Telnet protocol—unencrypted text communications | Official |
| 24 | TCP | UDP | Priv-mail : any private mail system. | Official |
| 25 | TCP | Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers | Official | |
| 26 | TCP | UDP | Unassigned | Official |
| 27 | TCP | UDP | NSW User System FE | Official |
| 29 | TCP | UDP | MSG ICP | Official |
| 33 | TCP | UDP | Display Support Protocol | Official |
| 35 | TCP | UDP | Any private printer server protocol | Official |
| 37 | TCP | UDP | TIME protocol | Official |
| 39 | TCP | UDP | Resource Location Protocol[7] (RLP)—used for determining the location of higher level services from hosts on a network | Official |
| 40 | TCP | UDP | Unassigned | Official |
| 42 | TCP | UDP | ARPA Host Name Server Protocol | Official |
| 42 | TCP | UDP | Windows Internet Name Service | Unofficial |
| 43 | TCP | WHOIS protocol | Official | |
| 47 | TCP | UDP | NI FTP[7] | Official |
| 49 | TCP | UDP | TACACS Login Host protocol | Official |
| 50 | TCP | UDP | Remote Mail Checking Protocol[8] | Official |
| 51 | TCP | UDP | IMP Logical Address Maintenance | Official |
| 52 | TCP | UDP | XNS (Xerox Network Systems) Time Protocol | Official |
| 53 | TCP | UDP | Domain Name System (DNS) | Official |
| 54 | TCP | UDP | XNS (Xerox Network Systems) Clearinghouse | Official |
| 55 | TCP | UDP | ISI Graphics Language (ISI-GL) | Official |
| 56 | TCP | UDP | XNS (Xerox Network Systems) Authentication | Official |
| 56 | TCP | UDP | Route Access Protocol (RAP)[9] | Unofficial |
| 57 | TCP | Mail Transfer Protocol (RFC 780) | Official | |
| 58 | TCP | UDP | XNS (Xerox Network Systems) Mail | Official |
| 64 | TCP | UDP | CI (Travelport) (formerly Covia) Comms Integrator | Official |
| 67 | UDP | Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP) | Official | |
| 68 | UDP | Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP) | Official | |
| 69 | UDP | Trivial File Transfer Protocol (TFTP) | Official | |
| 70 | TCP | Gopher protocol | Official | |
| 71 | TCP | NETRJS protocol | Official | |
| 72 | TCP | NETRJS protocol | Official | |
| 73 | TCP | NETRJS protocol | Official | |
| 74 | TCP | NETRJS protocol | Official | |
| 79 | TCP | Finger protocol | Official | |
| 80 | TCP | Hypertext Transfer Protocol (HTTP) | Unofficial [10] | |
| 81 | TCP | Torpark—Onion routing | Unofficial | |
| 82 | UDP | Torpark—Control | Unofficial | |
| 88 | TCP | UDP | Kerberos—authentication system | Official |
| 90 | TCP | UDP | dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map | Official |
| 90 | TCP | UDP | PointCast (dotcom) | Unofficial |
| 99 | TCP | WIP Message protocol | Unofficial | |
| 100 | UDP | CyberGate RAT protocol | Unofficial | |
| 101 | TCP | NIC host name | Official | |
| 102 | TCP | ISO-TSAP (Transport Service Access Point) Class 0 protocol;[11] also used by Digital Equipment Corporation DECnet (Phase V+) over TCP/IP | Official | |
| 104 | TCP | UDP | ACR/NEMA Digital Imaging and Communications in Medicine (DICOM) | Official |
| 105 | TCP | UDP | CCSO Nameserver Protocol (Qi/Ph) | Official |
| 107 | TCP | Remote TELNET Service[12] protocol | Official | |
| 108 | TCP | UDP | SNA Gateway Access Server [1] | Official |
| 109 | TCP | Post Office Protocol v2 (POP2) | Official | |
| 110 | TCP | Post Office Protocol v3 (POP3) | Official | |
| 111 | TCP | UDP | ONC RPC (Sun RPC) | Official |
| 113 | TCP | Ident—Authentication Service/Identification Protocol,[13] used by IRC servers to identify users | Official | |
| 113 | UDP | Authentication Service[13] (auth) | Official | |
| 115 | TCP | Simple File Transfer Protocol (SFTP) | Official | |
| 117 | STD | UUCP Path Service | Official | |
| 118 | TCP | UDP | SQL (Structured Query Language) Services | Official |
| 119 | TCP | Network News Transfer Protocol (NNTP)—retrieval of newsgroup messages | Official | |
| 123 | UDP | Network Time Protocol (NTP)—used for time synchronization | Official | |
| 126 | TCP | UDP | Formerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development | Official |
| 135 | TCP | UDP | DCE endpoint resolution | Official |
| 135 | TCP | UDP | Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[14] used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM | Unofficial |
| 137 | TCP | UDP | NetBIOS NetBIOS Name Service | Official |
| 138 | TCP | UDP | NetBIOS NetBIOS Datagram Service | Official |
| 139 | TCP | UDP | NetBIOS NetBIOS Session Service | Official |
| 143 | TCP | Internet Message Access Protocol (IMAP)—management of email messages | Official | |
| 152 | TCP | UDP | Background File Transfer Program (BFTP)[15] | Official |
| 153 | TCP | UDP | SGMP, Simple Gateway Monitoring Protocol | Official |
| 156 | TCP | UDP | SQL Service | Official |
| 158 | TCP | UDP | DMSP, Distributed Mail Service Protocol[16] | Unofficial |
| 161 | UDP | Simple Network Management Protocol (SNMP) | Official | |
| 162 | TCP | UDP | Simple Network Management Protocol Trap (SNMPTRAP)[17] | Official |
| 170 | TCP | Print-srv, Network PostScript | Official | |
| 175 | TCP | VMNET (IBM z/VM, z/OS & z/VSE - Network Job Entry(NJE)) | Official | |
| 177 | TCP | UDP | X Display Manager Control Protocol (XDMCP) | Official |
| 179 | TCP | BGP (Border Gateway Protocol) | Official | |
| 194 | TCP | UDP | Internet Relay Chat (IRC) | Official |
| 199 | TCP | UDP | SMUX, SNMP Unix Multiplexer | Official |
| 201 | TCP | UDP | AppleTalk Routing Maintenance | Official |
| 209 | TCP | UDP | The Quick Mail Transfer Protocol | Official |
| 210 | TCP | UDP | ANSI Z39.50 | Official |
| 213 | TCP | UDP | Internetwork Packet Exchange (IPX) | Official |
| 218 | TCP | UDP | Message posting protocol (MPP) | Official |
| 220 | TCP | UDP | Internet Message Access Protocol (IMAP), version 3 | Official |
| 259 | TCP | UDP | ESRO, Efficient Short Remote Operations | Official |
| 264 | TCP | UDP | BGMP, Border Gateway Multicast Protocol | Official |
| 280 | TCP | UDP | http-mgmt | Official |
| 300 | TCP | ThinLinc Web Access | Unofficial | |
| 308 | TCP | Novastor Online Backup | Official | |
| 311 | TCP | Mac OS X Server Admin (officially AppleShare IP Web administration) | Official | |
| 318 | TCP | UDP | PKIX TSP, Time Stamp Protocol | Official |
| 319 | UDP | Precision time protocol event messages | Official | |
| 320 | UDP | Precision time protocol general messages | Official | |
| 350 | TCP | UDP | MATIP-Type A, Mapping of Airline Traffic over Internet Protocol | Official |
| 351 | TCP | UDP | MATIP-Type B, Mapping of Airline Traffic over Internet Protocol | Official |
| 366 | TCP | UDP | ODMR, On-Demand Mail Relay | Official |
| 369 | TCP | UDP | Rpc2portmap | Official |
| 370 | TCP | codaauth2—Coda authentication server | Official | |
| 370 | UDP | codaauth2—Coda authentication server | Official | |
| 370 | UDP | securecast1—Outgoing packets to NAI's servers [18][dead link] | Unofficial | |
| 371 | TCP | UDP | ClearCase albd | Official |
| 383 | TCP | UDP | HP data alarm manager | Official |
| 384 | TCP | UDP | A Remote Network Server System | Official |
| 387 | TCP | UDP | AURP, AppleTalk Update-based Routing Protocol[19] | Official |
| 389 | TCP | UDP | Lightweight Directory Access Protocol (LDAP) | Official |
| 399 | TCP | UDP | Digital Equipment Corporation DECnet (Phase V+) over TCP/IP | Official |
| 401 | TCP | UDP | UPS Uninterruptible Power Supply | Official |
| 427 | TCP | UDP | Service Location Protocol (SLP) | Official |
| 443 | TCP | HTTPS (Hypertext Transfer Protocol over SSL/TLS) | Official | |
| 444 | TCP | UDP | SNPP, Simple Network Paging Protocol (RFC 1568) | Official |
| 445 | TCP | Microsoft-DS Active Directory, Windows shares | Official | |
| 445 | TCP | Microsoft-DS SMB file sharing | Official | |
| 464 | TCP | UDP | Kerberos Change/Set password | Official |
| 465 | TCP | URL Rendesvous Directory for SSM (Cisco protocol) | Official | |
| 475 | TCP | UDP | tcpnethaspsrv (Aladdin Knowledge Systems Hasp services, TCP/IP version) | Official |
| 497 | TCP | Dantz Retrospect | Official | |
| 500 | UDP | Internet Security Association and Key Management Protocol (ISAKMP) | Official | |
| 502 | TCP | UDP | Modbus, Protocol | Unofficial |
| 504 | TCP | UDP | Citadel—multiservice protocol for dedicated clients for the Citadel groupware system | Official |
| 512 | TCP | Rexec, Remote Process Execution | Official | |
| 512 | UDP | comsat, together with biff | Official | |
| 513 | TCP | rlogin | Official | |
| 513 | UDP | Who[20] | Official | |
| 514 | TCP | Shell—used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh) | Official | |
| 514 | UDP | Syslog—used for system logging | Official | |
| 515 | TCP | Line Printer Daemon—print service | Official | |
| 517 | UDP | Talk | Official | |
| 518 | UDP | NTalk | Official | |
| 520 | TCP | efs, extended file name server | Official | |
| 520 | UDP | Routing Information Protocol (RIP) | Official | |
| 524 | TCP | UDP | NetWare Core Protocol (NCP) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc. | Official |
| 525 | UDP | Timed, Timeserver | Official | |
| 530 | TCP | UDP | RPC | Official |
| 531 | TCP | UDP | AOL Instant Messenger | Unofficial |
| 532 | TCP | netnews | Official | |
| 533 | UDP | netwall, For Emergency Broadcasts | Official | |
| 540 | TCP | UUCP (Unix-to-Unix Copy Protocol) | Official | |
| 542 | TCP | UDP | commerce (Commerce Applications) | Official |
| 543 | TCP | klogin, Kerberos login | Official | |
| 544 | TCP | kshell, Kerberos Remote shell | Official | |
| 545 | TCP | OSIsoft PI (VMS), OSISoft PI Server Client Access | Unofficial | |
| 546 | TCP | UDP | DHCPv6 client | Official |
| 547 | TCP | UDP | DHCPv6 server | Official |
| 548 | TCP | Apple Filing Protocol (AFP) over TCP | Official | |
| 550 | TCP | UDP | new-rwho, new-who[20] | Official |
| 554 | TCP | UDP | Real Time Streaming Protocol (RTSP) | Official |
| 556 | TCP | Remotefs, RFS, rfs_server | Official | |
| 560 | UDP | rmonitor, Remote Monitor | Official | |
| 561 | UDP | monitor | Official | |
| 563 | TCP | UDP | NNTP protocol over TLS/SSL (NNTPS) | Official |
| 587 | TCP | e-mail message submission[21] (SMTP) | Official | |
| 591 | TCP | FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80) | Official | |
| 593 | TCP | UDP | HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server | Official |
| 604 | TCP | TUNNEL profile,[22] a protocol for BEEP peers to form an application layer tunnel | Official | |
| 623 | UDP | ASF Remote Management and Control Protocol (ASF-RMCP) | Official | |
| 631 | TCP | UDP | Internet Printing Protocol (IPP) | Official |
| 631 | TCP | UDP | Common Unix Printing System (CUPS) | Unofficial |
| 635 | TCP | UDP | RLZ DBase | Official |
| 636 | TCP | UDP | Lightweight Directory Access Protocol over TLS/SSL (LDAPS) | Official |
| 639 | TCP | UDP | MSDP, Multicast Source Discovery Protocol | Official |
| 641 | TCP | UDP | SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic | Official |
| 646 | TCP | UDP | LDP, Label Distribution Protocol, a routing protocol used in MPLS networks | Official |
| 647 | TCP | DHCP Failover protocol[23] | Official | |
| 648 | TCP | RRP (Registry Registrar Protocol)[24] | Official | |
| 651 | TCP | UDP | IEEE-MMS | Official |
| 653 | TCP | UDP | SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic | Official |
| 654 | TCP | Media Management System (MMS) Media Management Protocol (MMP)[25] | Official | |
| 657 | TCP | UDP | IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[26] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration | Official |
| 660 | TCP | Mac OS X Server administration | Official | |
| 666 | UDP | Doom, first online first-person shooter | Official | |
| 666 | TCP | airserv-ng, aircrack-ng's server for remote-controlling wireless devices | Unofficial | |
| 674 | TCP | ACAP (Application Configuration Access Protocol) | Official | |
| 688 | TCP | UDP | REALM-RUSD (ApplianceWare Server Appliance Management Protocol) | Official |
| 691 | TCP | MS Exchange Routing | Official | |
| 694 | TCP | UDP | Linux-HA High availability Heartbeat | Official |
| 695 | TCP | IEEE-MMS-SSL (IEEE Media Management System over SSL)[27] | Official | |
| 698 | UDP | OLSR (Optimized Link State Routing) | Official | |
| 700 | TCP | EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 5734) | Official | |
| 701 | TCP | LMP (Link Management Protocol (Internet)),[28] a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links | Official | |
| 702 | TCP | IRIS[29][30] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[31] (RFC 3983) | Official | |
| 706 | TCP | Secure Internet Live Conferencing (SILC) | Official | |
| 711 | TCP | Cisco Tag Distribution Protocol[32][33][34]—being replaced by the MPLS Label Distribution Protocol[35] | Official | |
| 712 | TCP | Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF) (RFC 3684) | Official | |
| 749 | TCP | UDP | Kerberos (protocol) administration | Official |
| 750 | UDP | kerberos-iv, Kerberos version IV | Official | |
| 751 | TCP | UDP | kerberos_master, Kerberos authentication | Unofficial |
| 752 | UDP | passwd_server, Kerberos Password (kpasswd) server | Unofficial | |
| 753 | TCP | Reverse Routing Header (rrh)[36] | Official | |
| 753 | UDP | Reverse Routing Header (rrh) | Official | |
| 753 | UDP | userreg_server, Kerberos userreg server | Unofficial | |
| 754 | TCP | tell send | Official | |
| 754 | TCP | krb5_prop, Kerberos v5 slave propagation | Unofficial | |
| 754 | UDP | tell send | Official | |
| 760 | TCP | UDP | krbupdate [kreg], Kerberos registration | Unofficial |
| 782 | TCP | Conserver serial-console management server | Unofficial | |
| 783 | TCP | SpamAssassin spamd daemon | Unofficial | |
| 808 | TCP | Microsoft Net.TCP Port Sharing Service | Official | |
| 829 | TCP | Certificate Management Protocol[37] | Unofficial | |
| 843 | TCP | Adobe Flash[38] | Unofficial | |
| 847 | TCP | DHCP Failover protocol | Official | |
| 848 | TCP | UDP | Group Domain Of Interpretation (GDOI) protocol | Official |
| 860 | TCP | iSCSI (RFC 3720) | Official | |
| 861 | TCP | UDP | OWAMP control (RFC 4656) | Official |
| 862 | TCP | UDP | TWAMP control (RFC 5357) | Official |
| 873 | TCP | rsync file synchronization protocol | Official | |
| 888 | TCP | cddbp, CD DataBase (CDDB) protocol (CDDBP) | Unofficial | |
| 897 | TCP | UDP | Brocade SMI-S RPC | Unofficial |
| 898 | TCP | UDP | Brocade SMI-S RPC SSL | Unofficial |
| 901 | TCP | Samba Web Administration Tool (SWAT) | Unofficial | |
| 901 | TCP | VMware Virtual Infrastructure Client (UDP from server being managed to management console) | Unofficial | |
| 901 | UDP | VMware Virtual Infrastructure Client (UDP from server being managed to management console) | Unofficial | |
| 902 | TCP | ideafarm-door | Official | |
| 902 | TCP | VMware Server Console (TCP from management console to server being Managed) | Unofficial | |
| 902 | UDP | ideafarm-door | Official | |
| 902 | UDP | VMware Server Console (UDP from server being managed to management console) | Unofficial | |
| 903 | TCP | VMware Remote Console [39] | Unofficial | |
| 904 | TCP | VMware Server Alternate (if 902 is in use, i.e. SUSE linux) | Unofficial | |
| 911 | TCP | Network Console on Acid (NCA)—local tty redirection over OpenSSH | Unofficial | |
| 944 | UDP | Network File System (protocol) Service | Unofficial | |
| 953 | TCP | UDP | Domain Name System (DNS) RNDC Service | Unofficial |
| 973 | UDP | Network File System (protocol) over IPv6 Service | Unofficial | |
| 981 | TCP | SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software | Unofficial | |
| 987 | TCP | Microsoft Corporation Microsoft Windows SBS SharePoint | Unofficial | |
| 989 | TCP | UDP | FTPS Protocol (data): FTP over TLS/SSL | Official |
| 990 | TCP | UDP | FTPS Protocol (control): FTP over TLS/SSL | Official |
| 991 | TCP | UDP | NAS (Netnews Administration System)[40] | Official |
| 992 | TCP | UDP | TELNET protocol over TLS/SSL | Official |
| 993 | TCP | Internet Message Access Protocol over SSL (IMAPS) | Official | |
| 995 | TCP | Post Office Protocol 3 over TLS/SSL (POP3S) | Official | |
| 999 | TCP | ScimoreDB Database System | Unofficial | |
| 1002 | TCP | Opsware agent (aka cogbot) | Unofficial | |
| 1010 | TCP | ThinLinc Web Administration | Unofficial | |
| 1023 | TCP | UDP | Reserved[1] | Official |
| 1024 | TCP | UDP | Reserved[1] | Official |
| 1025 | TCP | NFS or IIS or Teradata | Unofficial | |
| 1026 | TCP | Often used by Microsoft DCOM services | Unofficial | |
| 1029 | TCP | Often used by Microsoft DCOM services | Unofficial | |
| 1058 | TCP | UDP | nim, IBM AIX Network Installation Manager (NIM) | Official |
| 1059 | TCP | UDP | nimreg, IBM AIX Network Installation Manager (NIM) | Official |
| 1080 | TCP | SOCKS proxy | Official | |
| 1085 | TCP | UDP | WebObjects | Official |
| 1098 | TCP | UDP | rmiactivation, RMI Activation | Official |
| 1099 | TCP | UDP | rmiregistry, RMI Registry | Official |
| 1109 | TCP | UDP | Reserved[1] | Official |
| 1109 | TCP | Kerberos Post Office Protocol (KPOP) | Unofficial | |
| 1110 | UDP | EasyBits School network discovery protocol (for Intel's CMPC platform) | Unofficial | |
| 1119 | TCP | UDP | Used by some Blizzard games[41] | Unofficial |
| 1140 | TCP | UDP | AutoNOC protocol | Official |
| 1167 | UDP | phone, conference calling | Unofficial | |
| 1169 | TCP | UDP | Tripwire | Official |
| 1176 | TCP | Perceptive Automation Indigo Home automation server | Official | |
| 1182 | TCP | UDP | AcceleNet Intelligent Transfer Protocol | Official |
| 1194 | TCP | UDP | OpenVPN | Official |
| 1198 | TCP | UDP | The cajo project Free dynamic transparent distributed computing in Java | Official |
| 1200 | TCP | scol, protocol used by SCOL 3D virtual worlds server to answer world name resolution client request[42] | Official | |
| 1200 | UDP | scol, protocol used by SCOL 3D virtual worlds server to answer world name resolution client request | Official | |
| 1200 | UDP | Steam Friends Applet | Unofficial | |
| 1214 | TCP | Kazaa | Official | |
| 1217 | TCP | Uvora Online | Unofficial | |
| 1220 | TCP | QuickTime Streaming Server administration | Official | |
| 1223 | TCP | UDP | TGP, TrulyGlobal Protocol, also known as "The Gur Protocol" (named for Gur Kimchi of TrulyGlobal) | Official |
| 1232 | TCP | UDP | first-defense, Remote systems monitoring service from Nexum, Inc | Official |
| 1234 | UDP | VLC media player default port for UDP/RTP stream | Unofficial | |
| 1236 | TCP | Symantec BindView Control UNIX Default port for TCP management server connections | Unofficial | |
| 1241 | TCP | UDP | Nessus Security Scanner | Official |
| 1270 | TCP | UDP | Microsoft System Center Operations Manager (SCOM) (formerly Microsoft Operations Manager (MOM)) agent | Official |
| 1293 | TCP | UDP | IPSec (Internet Protocol Security) | Official |
| 1301 | TCP | Palmer Performance OBDNet | Unofficial | |
| 1309 | TCP | Altera Quartus jtagd | Unofficial | |
| 1311 | TCP | Dell OpenManage HTTPS | Official | |
| 1313 | TCP | Xbiim (Canvii server)[citation needed] | Unofficial | |
| 1314 | TCP | Festival Speech Synthesis System | Unofficial | |
| 1319 | TCP | AMX ICSP | Official | |
| 1319 | UDP | AMX ICSP | Official | |
| 1337 | UDP | Men and Mice DNS | Official | |
| 1337 | TCP | Men and Mice DNS | Official | |
| 1337 | TCP | WASTE Encrypted File Sharing Program | Unofficial | |
| 1344 | TCP | Internet Content Adaptation Protocol | Official | |
| 1352 | TCP | IBM Lotus Notes/Domino[43] (RPC) protocol | Official | |
| 1387 | TCP | UDP | cadsi-lm, LMS International (formerly Computer Aided Design Software, Inc. (CADSI)) LM | Official |
| 1414 | TCP | IBM WebSphere MQ (formerly known as MQSeries) | Official | |
| 1417 | TCP | UDP | Timbuktu Service 1 Port | Official |
| 1418 | TCP | UDP | Timbuktu Service 2 Port | Official |
| 1419 | TCP | UDP | Timbuktu Service 3 Port | Official |
| 1420 | TCP | UDP | Timbuktu Service 4 Port | Official |
| 1431 | TCP | Reverse Gossip Transport Protocol (RGTP), used to access a General-purpose Reverse-Ordered Gossip Gathering System (GROGGS) bulletin board, such as that implemented on the Cambridge University's Phoenix system | Official | |
| 1433 | TCP | MSSQL (Microsoft SQL Server database management system) Server | Official | |
| 1434 | TCP | UDP | MSSQL (Microsoft SQL Server database management system) Monitor | Official |
| 1470 | TCP | Solarwinds Kiwi Log Server | Official | |
| 1494 | TCP | Citrix XenApp Independent Computing Architecture (ICA) thin client protocol[44] | Official | |
| 1500 | TCP | NetGuard GuardianPro firewall (NT4-based) Remote Management | Unofficial | |
| 1501 | UDP | NetGuard GuardianPro firewall (NT4-based) Authentication Client | Unofficial | |
| 1503 | TCP | UDP | Windows Live Messenger (Whiteboard and Application Sharing) | Unofficial |
| 1512 | TCP | UDP | Microsoft Windows Internet Name Service (WINS) | Official |
| 1513 | TCP | UDP | Garena Garena Gaming Client | Official |
| 1521 | TCP | nCube License Manager | Official | |
| 1521 | TCP | Oracle database default listener, in future releases official port 2483 | Unofficial | |
| 1524 | TCP | UDP | ingreslock, ingres | Official |
| 1526 | TCP | Oracle database common alternative for listener | Unofficial | |
| 1527 | TCP | Apache Derby Network Server default port | Unofficial | |
| 1533 | TCP | IBM Sametime IM—Virtual Places Chat Microsoft SQL Server | Official | |
| 1534 | UDP | Eclipse Target Communication Framework (TCF) agent discovery[45] | Unofficial | |
| 1547 | TCP | UDP | Laplink | Official |
| 1550 | TCP | UDP | 3m-image-lm Image Storage license manager 3M Company | Official |
| 1550 | Gadu-Gadu (direct client-to-client) | Unofficial | ||
| 1581 | UDP | MIL STD 2045-47001 VMF | Official | |
| 1583 | TCP | Pervasive PSQL | Unofficial | |
| 1589 | UDP | Cisco VQP (VLAN Query Protocol) / VMPS | Unofficial | |
| 1590 | TCP | GE Smallworld Datastore Server (SWMFS/Smallworld Master Filesystem)[citation needed] | Unofficial | |
| 1627 | iSketch[citation needed] | Unofficial | ||
| 1645 | TCP | UDP | radius auth, RADIUS authentication protocol (default for Cisco and Juniper Networks RADIUS servers, but see port 1812 below) | Unofficial |
| 1646 | TCP | UDP | radius acct, RADIUS authentication protocol (default for Cisco and Juniper Networks RADIUS servers, but see port 1813 below) | Unofficial |
| 1666 | TCP | Perforce | Unofficial | |
| 1677 | TCP | UDP | Novell GroupWise clients in client/server access mode | Official |
| 1688 | TCP | Microsoft Key Management Service for KMS Windows Activation | Unofficial | |
| 1700 | UDP | Cisco RADIUS Change of Authorization for TrustSec[citation needed] | Unofficial | |
| 1701 | UDP | Layer 2 Forwarding Protocol (L2F) & Layer 2 Tunneling Protocol (L2TP) | Official | |
| 1707 | TCP | UDP | Windward Studios | Official |
| 1707 | TCP | Romtoc Interactive Modular Multiplayer Client-Server Online Application Interface & Layer 2 Tunneling Protocol (L2TP) | Unofficial | |
| 1716 | TCP | America's Army Massively multiplayer online game (MMO) | Unofficial | |
| 1719 | UDP | H.323 Registration and alternate communication | Official | |
| 1720 | TCP | H.323 Call signalling | Official | |
| 1723 | TCP | UDP | Microsoft Point-to-Point Tunneling Protocol (PPTP) | Official |
| 1725 | UDP | Valve Steam Client | Unofficial | |
| 1755 | TCP | UDP | Microsoft Media Services (MMS, ms-streaming) | Official |
| 1761 | UDP | cft-0 | Official | |
| 1761 | TCP | cft-0 | Official | |
| 1761 | TCP | Novell Zenworks Remote Control utility | Unofficial | |
| 1762–1768 | TCP | UDP | cft-1 to cft-7 | Official |
| 1776 | TCP | UDP | Federal Emergency Management Information SystemTemplate:Http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml | Official |
| 1792 | TCP | UDP | Moby[citation needed] | Unofficial |
| 1801 | TCP | UDP | Microsoft Message Queuing | Official |
| 1812 | TCP | UDP | radius, RADIUS authentication protocol | Official |
| 1813 | TCP | UDP | radacct, RADIUS accounting protocol | Official |
| 1863 | TCP | MSNP (Microsoft Notification Protocol), used by the Microsoft Messenger service and a number of Instant Messaging clients | Official | |
| 1883 | TCP | UDP | MQ Telemetry Transport (MQTT), formerly known as MQIsdp (MQSeries SCADA protocol) | Official |
| 1886 | TCP | Leonardo over IP Pro2col Ltd | Unofficial | |
| 1900 | UDP | Microsoft SSDP Enables discovery of UPnP devices | Official | |
| 1920 | TCP | IBM Tivoli monitoring console | Unofficial | |
| 1935 | TCP | Adobe Systems Macromedia Flash Real Time Messaging Protocol (RTMP) "plain" protocol | Official | |
| 1947 | TCP | UDP | SentinelSRM (hasplm), Aladdin HASP License Manager | Official |
| 1967 | UDP | Cisco IOS IP Service Level Agreements (IP SLAs) Control Protocol[citation needed] | Unofficial | |
| 1970 | TCP | UDP | Netop Business Solutions Netop Remote Control | Official |
| 1971 | TCP | UDP | Netop Business Solutions Netop School | Official |
| 1972 | TCP | UDP | InterSystems Caché | Official |
| 1975–1977 | UDP | Cisco TCO (Documentation) | Official | |
| 1984 | TCP | Big Brother and related Xymon (formerly Hobbit) System and Network Monitor | Official | |
| 1985 | UDP | Cisco HSRP | Official | |
| 1994 | TCP | UDP | Cisco STUN-SDLC (Serial Tunneling—Synchronous Data Link Control) protocol | Official |
| 1997 | TCP | Chizmo Networks Transfer Tool[citation needed] | Unofficial | |
| 1998 | TCP | UDP | Cisco X.25 over TCP (XOT) service | Official |
| 2000 | TCP | UDP | Cisco SCCP (Skinny) | Official |
| 2001 | UDP | CAPTAN Test Stand System | Unofficial | |
| 2002 | TCP | Secure Access Control Server (ACS) for Windows[citation needed] | Unofficial | |
| 2010 | TCP | Artemis: Spaceship Bridge Simulator default port | Unofficial | |
| 2012-2013 | TCP | Remoticus Server | Unofficial | |
| 2030 | Oracle services for Microsoft Transaction Server | Unofficial | ||
| 2031 | TCP | UDP | mobrien-chat(http://chat.mobrien.com:2031) | Official |
| 2041 | TCP | Mail.Ru Agent communication protocol[citation needed] | Unofficial | |
| 2049 | TCP | UDP | Network File System | Official |
| 2049 | UDP | shilp | Official | |
| 2053 | TCP | knetd Kerberos de-multiplexor | Unofficial | |
| 2056 | UDP | Civilization 4 multiplayer | Unofficial | |
| 2074 | TCP | UDP | Vertel VMF SA (i.e. App.. SpeakFreely) | Official |
| 2080 | TCP | UDP | Autodesk NLM (FLEXlm) | Official |
| 2082 | TCP | Infowave Mobility Server | Official | |
| 2082 | TCP | CPanel default | Unofficial | |
| 2083 | TCP | Secure Radius Service (radsec) | Official | |
| 2083 | TCP | CPanel default SSL | Unofficial | |
| 2086 | TCP | GNUnet | Official | |
| 2086 | TCP | WebHost Manager default | Unofficial | |
| 2087 | TCP | WebHost Manager default SSL | Unofficial | |
| 2095 | TCP | CPanel default Web mail | Unofficial | |
| 2096 | TCP | CPanel default SSL Web mail | Unofficial | |
| 2102 | TCP | UDP | zephyr-srv Project Athena Zephyr Notification Service server | Official |
| 2103 | TCP | UDP | zephyr-clt Project Athena Zephyr Notification Service serv-hm connection | Official |
| 2104 | TCP | UDP | zephyr-hm Project Athena Zephyr Notification Service hostmanager | Official |
| 2105 | TCP | UDP | IBM MiniPay | Official |
| 2105 | TCP | UDP | eklogin Kerberos encrypted remote login (rlogin) | Unofficial |
| 2105 | TCP | UDP | zephyr-hm-srv Project Athena Zephyr Notification Service hm-serv connection (should use port 2102) | Unofficial |
| 2115 | TCP | UDP | MIS Department | Unofficial |
| 2121 | TCP | FTP proxy[citation needed] | Unofficial | |
| 2142 | UDP | TDMoIP (RFC 5087) | Official | |
| 2144 | TCP | Iron Mountain LiveVault Agent[citation needed] | Unofficial | |
| 2145 | TCP | Iron Mountain LiveVault Agent[citation needed] | Unofficial | |
| 2156 | UDP | Talari Reliable Protocol | Official | |
| 2160 | TCP | APC Agent | Official | |
| 2161 | TCP | APC Agent | Official | |
| 2181 | TCP | UDP | EForward-document transport system | Official |
| 2190 | UDP | TiVoConnect Beacon[citation needed] | Unofficial | |
| 2195 | TCP | Apple Push Notification service Link | Unofficial | |
| 2196 | TCP | Apple Push Notification - Feedback Link | Unofficial | |
| 2200 | UDP | Tuxanci game server[46] | Unofficial | |
| 2210 | UDP | NOAAPORT Broadcast Network | Official | |
| 2210 | TCP | NOAAPORT Broadcast Network | Official | |
| 2210 | TCP | MikroTik Remote management for "The Dude" | Unofficial | |
| 2211 | UDP | EMWIN | Official | |
| 2211 | TCP | EMWIN | Official | |
| 2211 | TCP | MikroTik Secure management for "The Dude" | Unofficial | |
| 2212 | UDP | LeeCO POS Server Service | Official | |
| 2212 | TCP | LeeCO POS Server Service | Official | |
| 2212 | TCP | Port-A-Pour Remote WinBatch | Unofficial | |
| 2219 | TCP | UDP | NetIQ NCAP Protocol | Official |
| 2220 | TCP | UDP | NetIQ End2End | Official |
| 2221 | TCP | ESET Anti-virus updates | Unofficial | |
| 2222 | TCP | DirectAdmin default & ESET Remote Administration | Unofficial | |
| 2223 | UDP | Microsoft Office OS X antipiracy network monitor[citation needed] | Unofficial | |
| 2261 | TCP | UDP | CoMotion Master | Official |
| 2262 | TCP | UDP | CoMotion Backup | Official |
| 2301 | TCP | HP System Management Redirect to port 2381[citation needed] | Unofficial | |
| 2302 | UDP | ArmA multiplayer (default for game) | Unofficial | |
| 2302 | UDP | Halo: Combat Evolved multiplayer | Unofficial | |
| 2303 | UDP | ArmA multiplayer (default for server reporting) (default port for game +1) | Unofficial | |
| 2305 | UDP | ArmA multiplayer (default for VoN) (default port for game +3) | Unofficial | |
| 2323 | TCP | Philips TVs based on jointSPACE [47] | Unofficial | |
| 2369 | TCP | Default for BMC Software Control-M/Server—Configuration Agent, though often changed during installation | Official | |
| 2370 | TCP | Default for BMC Software Control-M/Server—to allow the Control-M/Enterprise Manager to connect to the Control-M/Server, though often changed during installation | Official | |
| 2379 | TCP | KGS Go Server | Unofficial | |
| 2381 | TCP | HP Insight Manager default for Web server[citation needed] | Unofficial | |
| 2399 | TCP | FileMaker Data Access Layer (ODBC/JDBC) | Official | |
| 2401 | TCP | CVS version control system | Unofficial | |
| 2404 | TCP | IEC 60870-5 -104, used to send electric power telecontrol messages between two systems via directly connected data circuits | Official | |
| 2420 | UDP | Westell Remote Access | Official | |
| 2424 | TCP | OrientDB database listening for Binary client connections | Official | |
| 2427 | UDP | Cisco MGCP | Official | |
| 2447 | TCP | UDP | ovwdb—OpenView Network Node Manager (NNM) daemon | Official |
| 2463 | TCP | UDP | LSI RAID Management formerly Symbios Logic | Official |
| 2480 | TCP | OrientDB database listening for HTTP client connections | Official | |
| 2483 | TCP | UDP | Oracle database listening for unsecure client connections to the listener, replaces port 1521 | Official |
| 2484 | TCP | UDP | Oracle database listening for SSL client connections to the listener | Official |
| 2500 | TCP | THEÒSMESSENGER listening for TheòsMessenger client connections | Official | |
| 2501 | TCP | TheosNet-Admin listening for TheòsMessenger client connections | Official | |
| 2518 | TCP | UDP | Willy | Official |
| 2525 | TCP | SMTP alternate[citation needed] | Unofficial | |
| 2535 | TCP | MADCAP - Multicast Address Dynamic Client Allocation Protocol | Official | |
| 2546 | TCP | UDP | EVault data protection services | Unofficial |
| 2593 | TCP | UDP | RunUO—Ultima Online server | Unofficial |
| 25565 | TCP | new ICA (Citrix) —when Session Reliability is enabled, TCP port 2598 replaces port 1494[44] | Unofficial | |
| 2599 | TCP | SonicWALL anti-spam traffic between Remote Analyzer (RA) and Control Center (CC) | Unofficial | |
| 2610 | TCP | TrackiT mobile device monitoring | Unofficial | |
| 2612 | TCP | UDP | QPasa from MQSoftware | Official |
| 2636 | TCP | Solve Service | Official | |
| 2638 | TCP | Sybase database listener[citation needed] | Unofficial | |
| 2641 | TCP | UDP | HDL Server from CNRI | Official |
| 2642 | TCP | UDP | Tragic | Official |
| 2698 | TCP | UDP | Citel / MCK IVPIP | Official |
| 2700–2800 | TCP | KnowShowGo P2P | Official | |
| 2710 | TCP | XBT Tracker | Unofficial | |
| 2710 | UDP | XBT Tracker experimental UDP tracker extension | Unofficial | |
| 2710 | TCP | Knuddels.de[citation needed] | Unofficial | |
| 2735 | TCP | UDP | NetIQ Monitor Console | Official |
| 2809 | TCP | corbaloc:iiop URL, per the CORBA 3.0.3 specification | Official | |
| 2809 | TCP | IBM WebSphere Application Server (WAS) Bootstrap/rmi default | Unofficial | |
| 2809 | UDP | corbaloc:iiop URL, per the CORBA 3.0.3 specification. | Official | |
| 2827 | TCP | I2P Basic Open Bridge API | Unofficial | |
| 2868 | TCP | UDP | Norman Proprietary Event Protocol NPEP | Official |
| 2944 | UDP | Megaco text H.248 | Unofficial | |
| 2945 | UDP | Megaco binary (ASN.1) H.248 | Unofficial | |
| 2947 | TCP | gpsd GPS daemon | Official | |
| 2948 | TCP | UDP | WAP-push Multimedia Messaging Service (MMS) | Official |
| 2949 | TCP | UDP | WAP-pushsecure Multimedia Messaging Service (MMS) | Official |
| 2967 | TCP | Symantec AntiVirus Corporate Edition | Unofficial | |
| 3000 | TCP | Miralix License server[citation needed] | Unofficial | |
| 3000 | TCP | Cloud9 Integrated Development Environment server | Unofficial | |
| 3000 | UDP | Distributed Interactive Simulation (DIS), modifiable default | Unofficial | |
| 3000 | TCP | Ruby on Rails development default[48] | Unofficial | |
| 3001 | TCP | Miralix Phone Monitor[citation needed] | Unofficial | |
| 3001 | TCP | Opsware server (Satellite) | Unofficial | |
| 3002 | TCP | Miralix CSTA[citation needed] | Unofficial | |
| 3003 | TCP | Miralix GreenBox API[citation needed] | Unofficial | |
| 3004 | TCP | Miralix InfoLink[citation needed] | Unofficial | |
| 3005 | TCP | Miralix TimeOut[citation needed] | Unofficial | |
| 3006 | TCP | Miralix SMS Client Connector[citation needed] | Unofficial | |
| 3007 | TCP | Miralix OM Server[citation needed] | Unofficial | |
| 3008 | TCP | Miralix Proxy[citation needed] | Unofficial | |
| 3017 | TCP | Miralix IVR and Voicemail[citation needed] | Unofficial | |
| 3025 | TCP | netpd.org[citation needed] | Unofficial | |
| 3030 | TCP | UDP | NetPanzer | Unofficial |
| 3040 | TCP | UDP | PandaROM Update Service Port | Official |
| 3050 | TCP | UDP | gds_db (Interbase/Firebird) | Official |
| 3051 | TCP | UDP | Galaxy Server (Gateway Ticketing Systems) | Official |
| 3052 | TCP | UDP | APC PowerChute Network [1] | Official |
| 3074 | TCP | UDP | NAT / Xbox LIVE and/or Games for Windows - LIVE | Official |
| 3100 | TCP | SMAUSA OpCon Scheduler as the default listen port[citation needed] | Official | |
| 3101 | TCP | BlackBerry Enterprise Server communication to cloud | Unofficial | |
| 3119 | TCP | D2000 Entis/Actis Application server | Official | |
| 3128 | TCP | Web caches and the default for the Squid (software) | Unofficial | |
| 3128 | TCP | Tatsoft default client connection[citation needed] | Unofficial | |
| 3162 | TCP | UDP | SFLM (Standard Floating License Manager) | Official |
| 3225 | TCP | UDP | FCIP (Fiber Channel over Internet Protocol) | Official |
| 3233 | TCP | UDP | WhiskerControl research control protocol | Official |
| 3235 | TCP | UDP | Galaxy Network Service (Gateway Ticketing Systems) | Official |
| 3260 | TCP | iSCSI target | Official | |
| 3268 | TCP | UDP | msft-gc, Microsoft Global Catalog (LDAP service which contains data from Active Directory forests) | Official |
| 3269 | TCP | UDP | msft-gc-ssl, Microsoft Global Catalog over SSL (similar to port 3268, LDAP over SSL) | Official |
| 3283 | TCP | Apple Remote Desktop reporting (officially Net Assistant, referring to an earlier product) | Official | |
| 3290 | UDP | Used by VATSIM, the Virtual Air Traffic Simulation network for voice communication. | Unofficial | |
| 3299 | TCP | SAP-Router (routing application proxy for SAP R/3) | Unofficial | |
| 3300 | TCP | UDP | Debate Gopher backend database system[citation needed] | Unofficial |
| 3305 | TCP | UDP | odette-ftp, Odette File Transfer Protocol (OFTP) | Official |
| 3306 | TCP | UDP | MySQL database system | Official |
| 3313 | TCP | Verisys file integrity monitoring software | Unofficial | |
| 3333 | TCP | Network Caller ID server | Unofficial | |
| 3333 | TCP | CruiseControl.rb[49] | Unofficial | |
| 3386 | TCP | UDP | GTP' 3GPP GSM/UMTS CDR logging protocol | Official |
| 3389 | TCP | UDP | Microsoft Terminal Server (RDP) officially registered as Windows Based Terminal (WBT) - Link | Official |
| 3396 | TCP | UDP | Novell NDPS Printer Agent | Official |
| 3412 | TCP | UDP | xmlBlaster | Official |
| 3455 | TCP | UDP | [RSVP] Reservation Protocol | Official |
| 3423 | TCP | Xware xTrm Communication Protocol | Official | |
| 3424 | TCP | Xware xTrm Communication Protocol over SSL | Official | |
| 3478 | TCP | UDP | STUN, a protocol for NAT traversal[50] | Official |
| 3478 | TCP | UDP | TURN, a protocol for NAT traversal[51] | Official |
| 3483 | UDP | Slim Devices discovery protocol | Official | |
| 3483 | TCP | Slim Devices SlimProto protocol | Official | |
| 3516 | TCP | UDP | Smartcard Port | Official |
| 3527 | UDP | Microsoft Message Queuing | Official | |
| 3535 | TCP | SMTP alternate[52] | Unofficial | |
| 3537 | TCP | UDP | ni-visa-remote[citation needed] | Unofficial |
| 3544 | UDP | Teredo tunneling | Official | |
| 3605 | UDP | ComCam IO Port | Official | |
| 3606 | TCP | UDP | Splitlock Server | Official |
| 3632 | TCP | distributed compiler | Official | |
| 3689 | TCP | Digital Audio Access Protocol (DAAP)—used by Apple’s iTunes and AirPort Express | Official | |
| 3690 | TCP | UDP | Subversion (SVN) version control system | Official |
| 3702 | TCP | UDP | Web Services Dynamic Discovery (WS-Discovery), used by various components of Windows Vista | Official |
| 3724 | TCP | UDP | Used by some Blizzard games[41] | Official |
| 3724 | TCP | Club Penguin Disney online game for kids | Unofficial | |
| 3784 | TCP | UDP | VoIP program used by Ventrilo | Unofficial |
| 3785 | UDP | VoIP program used by Ventrilo | Unofficial | |
| 3799 | UDP | RADIUS change of authorization | Unofficial | |
| 3800 | TCP | Used by HGG programs[citation needed] | Unofficial | |
| 3825 | TCP | Used by RedSeal Networks client/server connection[citation needed] | Unofficial | |
| 3826 | TCP | UDP | WarMUX game server | Official |
| 3826 | TCP | Used by RedSeal Networks client/server connection[citation needed] | Unofficial | |
| 3835 | TCP | Used by RedSeal Networks client/server connection[citation needed] | Unofficial | |
| 3880 | TCP | UDP | IGRS | Official |
| 3868 | TCP | SCTP | Diameter base protocol (RFC 3588) | Official |
| 3872 | TCP | Oracle Management Remote Agent[citation needed] | Unofficial | |
| 3899 | TCP | Remote Administrator | Unofficial | |
| 3900 | TCP | udt_os, IBM UniData UDT OS[53] | Official | |
| 3945 | TCP | UDP | EMCADS service, a Giritech product used by G/On | Official |
| 3978 | TCP | UDP | OpenTTD game (masterserver and content service) | Unofficial |
| 3979 | TCP | UDP | OpenTTD game | Unofficial |
| 3999 | TCP | UDP | Norman distributed scanning service | Official |
| 4000 | TCP | UDP | Diablo II game | Unofficial |
| 4001 | TCP | Microsoft Ants game | Unofficial | |
| 4007 | TCP | PrintBuzzer printer monitoring socket server[citation needed] | Unofficial | |
| 4018 | TCP | UDP | protocol information and warnings | Official |
| 4035 | TCP | TCP | IBM Rational Developer for System z Remote System Explorer Daemon | Unofficial |
| 4045 | TCP | UDP | Solaris lockd NFS lock daemon/manager | Unofficial |
| 4069 | UDP | Minger Email Address Verification Protocol[54] | Official | |
| 4089 | TCP | UDP | OpenCORE Remote Control Service | Official |
| 4093 | TCP | UDP | PxPlus Client server interface ProvideX | Official |
| 4096 | TCP | UDP | Ascom Timeplex BRE (Bridge Relay Element) | Official |
| 4100 | WatchGuard authentication applet default | Unofficial | ||
| 4105 | TCP | UDP | Shofar (ShofarNexus) | Official |
| 4111 | TCP | Xgrid | Official | |
| 4116 | TCP | UDP | Smartcard-TLS | Official |
| 4125 | TCP | Microsoft Remote Web Workplace administration | Unofficial | |
| 4172 | TCP | UDP | Teradici PCoIP | Official |
| 4201 | TCP | TinyMUD and various derivatives | Unofficial | |
| 4226 | TCP | UDP | Aleph One (game) | Unofficial |
| 4224 | TCP | Cisco Audio Session Tunneling[citation needed] | Unofficial | |
| 4242 | TCP | Reverse Battle Tetris | Unofficial | |
| 4242 | TCP | Orthanc - Default DICOM port | Unofficial | |
| 4321 | TCP | Referral Whois (RWhois) Protocol[55] | Official | |
| 4323 | UDP | Lincoln Electric's ArcLink/XT[citation needed] | Unofficial | |
| 4433-4436 | TCP | Axence nVision [56] | Unofficial | |
| 4444-4445 | TCP | I2P HTTP/S proxy | Unofficial | |
| 4486 | TCP | UDP | Integrated Client Message Service (ICMS) | Official |
| 4500 | UDP | IPSec NAT Traversal (RFC 3947) | Official | |
| 4502-4534 | TCP | Microsoft Silverlight connectable ports under non-elevated trust | Official | |
| 4534 | UDP | Armagetron Advanced default server port | Unofficial | |
| 4567 | TCP | Sinatra default server port in development mode (HTTP) | Unofficial | |
| 4569 | UDP | Inter-Asterisk eXchange (IAX2) | Official | |
| 4610–4640 | TCP | QualiSystems TestShell Suite Services | Unofficial | |
| 4662 | UDP | OrbitNet Message Service | Official | |
| 4662 | TCP | OrbitNet Message Service | Official | |
| 4662 | TCP | Default for older versions of eMule[57] | Unofficial | |
| 4664 | TCP | Google Desktop Search | Unofficial | |
| 4665 | TCP | Tardis Beacon Tcp-control of first worm that re-writes time by compiling from code in cleartext. | Official | |
| 4672 | UDP | Default for older versions of eMule[57] | Unofficial | |
| 4711 | TCP | eMule optional web interface[57] | Unofficial | |
| 4711 | TCP | McAfee Web Gateway 7 - Default GUI Port HTTP[citation needed] | Unofficial | |
| 4712 | TCP | McAfee Web Gateway 7 - Default GUI Port HTTPS[citation needed] | Unofficial | |
| 4713 | TCP | PulseAudio sound server | Unofficial | |
| 4728 | TCP | Computer Associates Desktop and Server Management (DMP)/Port Multiplexer [58] | Official | |
| 4730 | TCP | UDP | Gearman' job server | Official |
| 4732 | UDP | Digital Airways' OHM server's commands to mobile devices (used mainly for binary SMS) | Official | |
| 4747 | TCP | Apprentice | Unofficial | |
| 4750 | TCP | BladeLogic Agent | Unofficial | |
| 4753 | TCP | UDP | SIMON (service and discovery) | Official |
| 4840 | TCP | UDP | OPC UA TCP Protocol for OPC Unified Architecture from OPC Foundation | Official |
| 4843 | TCP | UDP | OPC UA TCP Protocol over TLS/SSL for OPC Unified Architecture from OPC Foundation | Official |
| 4847 | TCP | UDP | Web Fresh Communication, Quadrion Software & Odorless Entertainment | Official |
| 4894 | TCP | UDP | LysKOM Protocol A | Official |
| 4899 | TCP | UDP | Radmin remote administration tool | Official |
| 4949 | TCP | Munin Resource Monitoring Tool | Official | |
| 4950 | TCP | UDP | Cylon Controls UC32 Communications Port | Official |
| 4982 | TCP | UDP | Solar Data Log (JK client app for PV solar inverters)[citation needed] | Unofficial |
| 4993 | TCP | UDP | Home FTP Server web Interface Default Port[citation needed] | Unofficial |
| 5000 | TCP | commplex-main | Official | |
| 5000 | TCP | UPnP—Windows network device interoperability | Unofficial | |
| 5000 | TCP | UDP | VTun—VPN Software | Unofficial |
| 5000 | UDP | FlightGear multiplayer[59] | Unofficial | |
| 5000 | TCP | Synology Inc. Management Console, File Station, Audio Station | Unofficial | |
| 5001 | TCP | commplex-link | Official | |
| 5001 | TCP | Slingbox and Slingplayer | Unofficial | |
| 5001 | TCP | Iperf (Tool for measuring TCP and UDP bandwidth performance) | Unofficial | |
| 5001 | UDP | Iperf (Tool for measuring TCP and UDP bandwidth performance) | Unofficial | |
| 5001 | TCP | Synology Inc. Secured Management Console, File Station, Audio Station | Unofficial | |
| 5002 | TCP | SOLICARD ARX[60] | Unofficial | |
| 5002 | UDP | Drobo Dashboard[61] | Unofficial | |
| 5003 | TCP | UDP | FileMaker | Official |
| 5004 | TCP | UDP | RTP (Real-time Transport Protocol) media data (RFC 3551, RFC 4571) | Official |
| 5004 | DCCP | RTP (Real-time Transport Protocol) media data (RFC 3551, RFC 4571) | Official | |
| 5005 | TCP | UDP | RTP (Real-time Transport Protocol) control protocol (RFC 3551, RFC 4571) | Official |
| 5005 | DCCP | RTP (Real-time Transport Protocol) control protocol (RFC 3551, RFC 4571) | Official | |
| 5010 | TCP | UDP | Registered to: TelePath (the IBM FlowMark workflow-management system messaging platform)[62] | |
| The TCP port is now used for: IBM WebSphere MQ Workflow | Official | |||
| 5011 | TCP | UDP | TelePath (the IBM FlowMark workflow-management system messaging platform)[62] | Official |
| 5029 | TCP | Sonic Robo Blast 2 : Multiplayer[63] | Unofficial | |
| 5031 | TCP | UDP | AVM CAPI-over-TCP (ISDN over Ethernet tunneling)[citation needed] | Unofficial |
| 5037 | TCP | Android ADB server | Unofficial | |
| 5050 | TCP | Yahoo! Messenger | Unofficial | |
| 5051 | TCP | ita-agent Symantec Intruder Alert[64] | Official | |
| 5060 | TCP | UDP | Session Initiation Protocol (SIP) | Official |
| 5061 | TCP | Session Initiation Protocol (SIP) over TLS | Official | |
| 5070 | TCP | Binary Floor Control Protocol (BFCP),[65] published as RFC 4582, is a protocol that allows for an additional video channel (known as the content channel) alongside the main video channel in a video-conferencing call that uses SIP. Also used for Session Initiation Protocol (SIP) preferred port for PUBLISH on SIP Trunk to Cisco Unified Presence Server (CUPS) | Unofficial | |
| 5082 | TCP | UDP | Qpur Communication Protocol | Official |
| 5083 | TCP | UDP | Qpur File Protocol | Official |
| 5084 | TCP | UDP | EPCglobal Low Level Reader Protocol (LLRP) | Official |
| 5085 | TCP | UDP | EPCglobal Low Level Reader Protocol (LLRP) over TLS | Official |
| 5093 | UDP | SafeNet, Inc Sentinel LM, Sentinel RMS, License Manager, Client-to-Server | Official | |
| 5099 | TCP | UDP | SafeNet, Inc Sentinel LM, Sentinel RMS, License Manager, Server-to-Server | Official |
| 5104 | TCP | IBM Tivoli Framework NetCOOL/Impact[66] HTTP Service | Unofficial | |
| 5106 | TCP | A-Talk Common connection[citation needed] | Unofficial | |
| 5107 | TCP | A-Talk Remote server connection[citation needed] | Unofficial | |
| 5108 | TCP | VPOP3 Mail Server Webmail[citation needed] | Unofficial | |
| 5109 | TCP | UDP | VPOP3 Mail Server Status[citation needed] | Unofficial |
| 5110 | TCP | ProRat Server | Unofficial | |
| 5121 | TCP | Neverwinter Nights | Unofficial | |
| 5124 | TCP | UDP | TorgaNET (Micronational Darknet) | Unofficial |
| 5125 | TCP | UDP | TorgaNET (Micronational Intelligence Darknet) | Unofficial |
| 5150 | TCP | UDP | ATMP Ascend Tunnel Management Protocol[67] | Official |
| 5150 | TCP | UDP | Malware Cerberus RAT[citation needed] | Unofficial |
| 5151 | TCP | ESRI SDE Instance | Official | |
| 5151 | UDP | ESRI SDE Remote Start | Official | |
| 5154 | TCP | UDP | BZFlag | Official |
| 5176 | TCP | ConsoleWorks default UI interface[citation needed] | Unofficial | |
| 5190 | TCP | ICQ and AOL Instant Messenger | Official | |
| 5222 | TCP | Extensible Messaging and Presence Protocol (XMPP) client connection[68][69] | Official | |
| 5223 | TCP | Extensible Messaging and Presence Protocol (XMPP) client connection over SSL | Unofficial | |
| 5228 | TCP | HP Virtual Room Service | Official | |
| 5228 | TCP | Google Play, Android Cloud to Device Messaging Service, Google Cloud Messaging | Unofficial | |
| 5246 | UDP | Control And Provisioning of Wireless Access Points (CAPWAP) CAPWAP control[70] | Official | |
| 5247 | UDP | Control And Provisioning of Wireless Access Points (CAPWAP) CAPWAP data[70] | Official | |
| 5269 | TCP | Extensible Messaging and Presence Protocol (XMPP) server connection[68][69] | Official | |
| 5280 | TCP | Extensible Messaging and Presence Protocol (XMPP) XEP-0124: Bidirectional-streams Over Synchronous HTTP (BOSH) | Official | |
| 5281 | TCP | Undo License Manager | Official | |
| 5281 | TCP | Extensible Messaging and Presence Protocol (XMPP)[71] | Unofficial | |
| 5298 | TCP | UDP | Extensible Messaging and Presence Protocol (XMPP)[72] | Official |
| 5310 | TCP | UDP | Outlaws (1997 video game). Both UDP and TCP are reserved, but only UDP is used | Official |
| 5349 | TCP | STUN, a protocol for NAT traversal (UDP is reserved)[50] | Official | |
| 5349 | TCP | TURN, a protocol for NAT traversal (UDP is reserved)[51] | Official | |
| 5351 | TCP | UDP | NAT Port Mapping Protocol—client-requested configuration for inbound connections through network address translators | Official |
| 5353 | UDP | Multicast DNS (mDNS) | Official | |
| 5355 | TCP | UDP | LLMNR—Link-Local Multicast Name Resolution, allows hosts to perform name resolution for hosts on the same local link (only provided by Windows Vista and Server 2008) | Official |
| 5357 | TCP | UDP | Web Services for Devices (WSDAPI) (only provided by Windows Vista, Windows 7 and Server 2008) | Unofficial |
| 5358 | TCP | UDP | WSDAPI Applications to Use a Secure Channel (only provided by Windows Vista, Windows 7 and Server 2008) | Unofficial |
| 5394 | UDP | Kega Fusion, a Sega multi-console emulator[73][74] | Unofficial | |
| 5402 | TCP | UDP | mftp, Stratacache OmniCast content delivery system MFTP file sharing protocol | Official |
| 5405 | TCP | UDP | NetSupport Manager | Official |
| 5412 | TCP | UDP | IBM Rational Synergy (Telelogic Synergy) (Continuus CM) Message Router | Official |
| 5413 | TCP | UDP | Wonderware SuiteLink service | Official |
| 5421 | TCP | UDP | NetSupport Manager | Official |
| 5432 | TCP | UDP | PostgreSQL database system | Official |
| 5433 | TCP | Bouwsoft file/webserver[75] | Unofficial | |
| 5445 | UDP | Cisco Unified Video Advantage[citation needed] | Unofficial | |
| 5450 | TCP | OSIsoft PI Server Client Access | Unofficial | |
| 5457 | TCP | OSIsoft PI Asset Framework Client Access | Unofficial | |
| 5458 | TCP | OSIsoft PI Notifications Client Access | Unofficial | |
| 5495 | TCP | IBM Cognos TM1 Admin server | Unofficial | |
| 5498 | TCP | Hotline tracker server connection | Unofficial | |
| 5499 | UDP | Hotline tracker server discovery | Unofficial | |
| 5500 | TCP | VNC remote desktop protocol—for incoming listening viewer, Hotline control connection | Unofficial | |
| 5501 | TCP | Hotline file transfer connection | Unofficial | |
| 5517 | TCP | Setiqueue Proxy server client for SETI@Home project | Unofficial | |
| 5550 | TCP | Hewlett-Packard Data Protector[citation needed] | Unofficial | |
| 5555 | TCP | Freeciv versions up to 2.0, Hewlett-Packard Data Protector, McAfee EndPoint Encryption Database Server, SAP, Default for Microsoft Dynamics CRM 4.0 | Unofficial | |
| 5556 | TCP | UDP | Freeciv | Official |
| 5591 | TCP | Default for Tidal Enterprise Scheduler master-Socket used for communication between Agent-to-Master, though can be changed[citation needed] | Unofficial | |
| 5631 | TCP | pcANYWHEREdata, Symantec pcAnywhere (version 7.52 and later[76])[77] data | Official | |
| 5632 | UDP | pcANYWHEREstat, Symantec pcAnywhere (version 7.52 and later) status | Official | |
| 5656 | TCP | IBM Lotus Sametime p2p file transfer | Unofficial | |
| 5666 | TCP | NRPE (Nagios) | Unofficial | |
| 5667 | TCP | NSCA (Nagios) | Unofficial | |
| 5672 | TCP | AMQP | Official | |
| 5678 | UDP | Mikrotik RouterOS Neighbor Discovery Protocol (MNDP) | Unofficial | |
| 5721 | TCP | UDP | Kaseya[citation needed] | Unofficial |
| 5723 | TCP | Operations Manager[78] | Unofficial | |
| 5741 | TCP | UDP | IDA Discover Port 1 | Official |
| 5742 | TCP | UDP | IDA Discover Port 2 | Official |
| 5800 | TCP | VNC remote desktop protocol—for use over HTTP | Unofficial | |
| 5814 | TCP | UDP | Hewlett-Packard Support Automation (HP OpenView Self-Healing Services)[citation needed] | Official |
| 5850 | TCP | COMIT SE (PCR)[citation needed] | Unofficial | |
| 5852 | TCP | Adeona client: communications to OpenDHT[citation needed] | Unofficial | |
| 5900 | TCP | UDP | Virtual Network Computing (VNC) remote desktop protocol (used by Apple Remote Desktop and others) | Official |
| 5912 | TCP | Default for Tidal Enterprise Scheduler agent-Socket used for communication between Master-to-Agent, though can be changed[citation needed] | Unofficial | |
| 5938 | TCP | UDP | TeamViewer remote desktop protocol | Unofficial |
| 5984 | TCP | UDP | CouchDB database server | Official |
| 5999 | TCP | CVSup file update tool[79] | Official | |
| 6000 | TCP | X11—used between an X client and server over the network | Official | |
| 6001 | UDP | X11—used between an X client and server over the network | Official | |
| 6005 | TCP | Default for BMC Software Control-M/Server—Socket used for communication between Control-M processes—though often changed during installation | Official | |
| 6005 | TCP | Default for Camfrog chat & cam client | Unofficial | |
| 6009 | TCP | JD Edwards EnterpriseOne ERP system JDENet messaging client listener | Unofficial | |
| 6050 | TCP | Arcserve backup | Unofficial | |
| 6050 | TCP | Nortel software[citation needed] | Unofficial | |
| 6051 | TCP | Arcserve backup | Unofficial | |
| 6072 | TCP | iOperator Protocol Signal Port[citation needed] | Unofficial | |
| 6086 | TCP | PDTP—FTP like file server in a P2P network | Official | |
| 6100 | TCP | Vizrt System | Unofficial | |
| 6100 | TCP | Ventrilo This is the authentication port that must be allowed outbound for version 3 of Ventrilo | Official | |
| 6101 | TCP | Backup Exec Agent Browser[citation needed] | Unofficial | |
| 6110 | TCP | UDP | softcm, HP Softbench CM | Official |
| 6111 | TCP | UDP | spc, HP Softbench Sub-Process Control | Official |
| 6112 | UDP | dtspcd—a network daemon that accepts requests from clients to execute commands and launch applications remotely | Official | |
| 6112 | TCP | dtspcd—a network daemon that accepts requests from clients to execute commands and launch applications remotely | Official | |
| 6112 | TCP | Blizzard's Battle.net gaming service and some games,[41] ArenaNet gaming service, Relic gaming service | Unofficial | |
| 6112 | TCP | Club Penguin Disney online game for kids | Unofficial | |
| 6113 | TCP | Club Penguin Disney online game for kids, Used by some Blizzard games[41] | Unofficial | |
| 6129 | TCP | DameWare Remote Control | Official | |
| 6257 | UDP | WinMX (see also 6699) | Unofficial | |
| 6260 | TCP | UDP | planet M.U.L.E. | Unofficial |
| 6262 | TCP | Sybase Advantage Database Server | Unofficial | |
| 6324 | TCP | UDP | Hall Research Device discovery and configuration | Official |
| 6343 | UDP | SFlow, sFlow traffic monitoring | Official | |
| 6346 | TCP | UDP | gnutella-svc, gnutella (FrostWire, Limewire, Shareaza, etc.) | Official |
| 6347 | TCP | UDP | gnutella-rtr, Gnutella alternate | Official |
| 6350 | TCP | UDP | App Discovery and Access Protocol | Official |
| 6389 | TCP | EMC CLARiiON | Unofficial | |
| 6432 | TCP | PgBouncer - A connection pooler for PostgreSQL | Official | |
| 6444 | TCP | UDP | Sun Grid Engine—Qmaster Service | Official |
| 6445 | TCP | UDP | Sun Grid Engine—Execution Service | Official |
| 6502 | TCP | UDP | Netop Business Solutions - NetOp Remote Control | Unofficial |
| 6503 | UDP | Netop Business Solutions - NetOp School[citation needed] | Unofficial | |
| 6514 | TCP | Syslog over TLS[80] | Official | |
| 6515 | TCP | UDP | Elipse RPC Protocol (REC) | Official |
| 6522 | TCP | Gobby (and other libobby-based software) | Unofficial | |
| 6523 | TCP | Gobby 0.5 (and other libinfinity-based software) | Unofficial | |
| 6543 | UDP | Paradigm Research & Development Jetnet[81] default | Unofficial | |
| 6566 | TCP | SANE (Scanner Access Now Easy)—SANE network scanner daemon | Unofficial | |
| 6560-6561 | TCP | Speech-Dispatcher daemon | Unofficial | |
| 6571 | Windows Live FolderShare client | Unofficial | ||
| 6600 | TCP | Music Player Daemon (MPD) | Unofficial | |
| 6619 | TCP | UDP | odette-ftps, Odette File Transfer Protocol (OFTP) over TLS/SSL | Official |
| 6646 | UDP | McAfee Network Agent[citation needed] | Unofficial | |
| 6660–6664 | TCP | Internet Relay Chat (IRC) | Unofficial | |
| 6665–6669 | TCP | Internet Relay Chat (IRC) | Official | |
| 6679 | TCP | UDP | Osorno Automation Protocol (OSAUT) | Official |
| 6679 | TCP | IRC SSL (Secure Internet Relay Chat)—often used | Unofficial | |
| 6697 | TCP | IRC SSL (Secure Internet Relay Chat)—often used | Unofficial | |
| 6699 | TCP | WinMX (see also 6257) | Unofficial | |
| 6702 | TCP | Default for Tidal Enterprise Scheduler client-Socket used for communication between Client-to-Master, though can be changed[citation needed] | Unofficial | |
| 6715 | TCP | AberMUD and derivatives default port | Unofficial | |
| 6771 | UDP | Polycom server broadcast[citation needed] | Unofficial | |
| 6789 | TCP | Campbell Scientific Loggernet Software[82] | Unofficial | |
| 6789 | TCP | Bucky's Instant Messaging Program | Unofficial | |
| 6881–6887 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6888 | TCP | UDP | MUSE | Official |
| 6888 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6889–6890 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6891–6900 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6891–6900 | TCP | UDP | Windows Live Messenger (File transfer) | Unofficial |
| 6901 | TCP | UDP | Windows Live Messenger (Voice) | Unofficial |
| 6901 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6902–6968 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6969 | TCP | UDP | acmsoda | Official |
| 6969 | TCP | BitTorrent tracker | Unofficial | |
| 6970–6999 | TCP | UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 7000 | TCP | Default for Vuze's built in HTTPS Bittorrent Tracker | Unofficial | |
| 7000 | TCP | Avira Server Management Console | Unofficial | |
| 7001 | TCP | Avira Server Management Console | Unofficial | |
| 7001 | TCP | Default for BEA WebLogic Server's HTTP server, though often changed during installation | Unofficial | |
| 7002 | TCP | Default for BEA WebLogic Server's HTTPS server, though often changed during installation | Unofficial | |
| 7005 | TCP | Default for BMC Software Control-M/Server and Control-M/Agent for Agent-to-Server, though often changed during installation | Unofficial | |
| 7006 | TCP | Default for BMC Software Control-M/Server and Control-M/Agent for Server-to-Agent, though often changed during installation | Unofficial | |
| 7010 | TCP | Default for Cisco AON AMC (AON Management Console) [83] | Unofficial | |
| 7022 | TCP | Database mirroring endpoints[citation needed] | Unofficial | |
| 7023 | UDP | Bryan Wilcutt T2-NMCS Protocol for SatCom Modems | Official | |
| 7025 | TCP | Zimbra LMTP [mailbox]—local mail delivery | Unofficial | |
| 7047 | TCP | Zimbra conversion server | Unofficial | |
| 7080 | Sepialine Argos Communications port | Unofficial | ||
| 7133 | TCP | Enemy Territory: Quake Wars | Unofficial | |
| 7144 | TCP | Peercast[citation needed] | Unofficial | |
| 7145 | TCP | Peercast[citation needed] | Unofficial | |
| 7171 | TCP | Tibia | Unofficial | |
| 7306 | TCP | Zimbra mysql [mailbox][citation needed] | Unofficial | |
| 7307 | TCP | Zimbra mysql [logger][citation needed] | Unofficial | |
| 7312 | UDP | Sibelius License Server | Unofficial | |
| 7396 | TCP | Web control interface for Folding@home v7.3.6 and later[84] | Unofficial | |
| 7400 | TCP | UDP | RTPS (Real Time Publish Subscribe) DDS Discovery | Official |
| 7401 | TCP | UDP | RTPS (Real Time Publish Subscribe) DDS User-Traffic | Official |
| 7402 | TCP | UDP | RTPS (Real Time Publish Subscribe) DDS Meta-Traffic | Official |
| 7473 | TCP | UDP | Rise: The Vieneo Province | Official |
| 7547 | TCP | UDP | CPE WAN Management Protocol Technical Report 069 | Official |
| 7615 | TCP | ISL Online[85] communication protocol | Unofficial | |
| 7624 | TCP | UDP | Instrument Neutral Distributed Interface | Official |
| 7634 | TCP | hddtemp - Utility to monitor hard drive temperature | Unofficial | |
| 7652-7654 | TCP | I2P anonymizing overlay network | Unofficial | |
| 7655 | UDP | I2P SAM Bridge Socket API | Unofficial | |
| 7656-7660 | TCP | I2P anonymizing overlay network | Unofficial | |
| 7670 | TCP | BrettspielWelt BSW Boardgame Portal | Unofficial | |
| 7676 | TCP | Aqumin AlphaVision Remote Command Interface[citation needed] | Unofficial | |
| 7700 | UDP | P2P DC (RedHub)[citation needed] | Unofficial | |
| 7707 | UDP | Killing Floor | Unofficial | |
| 7708 | UDP | Killing Floor | Unofficial | |
| 7717 | UDP | Killing Floor | Unofficial | |
| 7777 | TCP | iChat server file transfer proxy | Unofficial | |
| 7777 | TCP | Oracle Cluster File System 2[citation needed] | Unofficial | |
| 7777 | TCP | Windows backdoor program tini.exe default[citation needed] | Unofficial | |
| 7777 | TCP | Xivio default Chat Server[citation needed] | Unofficial | |
| 7777 | TCP | Terraria default server | Unofficial | |
| 7777 | UDP | San Andreas Multiplayer default server | Unofficial | |
| 7778 | TCP | Bad Trip MUD[citation needed] | Unofficial | |
| 7777-7788 | UDP | Unreal Tournament series default server[citation needed] | Unofficial | |
| 7777-7788 | TCP | Unreal Tournament series default server[citation needed] | Unofficial | |
| 7787-7788 | TCP | GFI EventsManager 7 & 8[citation needed] | Official | |
| 7831 | TCP | Default used by Smartlaunch Internet Cafe Administration[86] software | Unofficial | |
| 7880 | TCP | UDP | PowerSchool Gradebook Server[citation needed] | Unofficial |
| 7890 | TCP | Default that will be used by the iControl Internet Cafe Suite Administration software | Unofficial | |
| 7915 | TCP | Default for YSFlight server[87] | Unofficial | |
| 7935 | TCP | Fixed port used for Adobe Flash Debug Player to communicate with a debugger (Flash IDE, Flex Builder or fdb).[88] | Unofficial | |
| 7937-9936 | TCP | UDP | EMC2 (Legato) Networker or Sun Solstice Backup | Official |
| 8000 | UDP | iRDMI (Intel Remote Desktop Management Interface)[89]—sometimes erroneously used instead of port 8080 | Official | |
| 8000 | TCP | iRDMI (Intel Remote Desktop Management Interface)[89]—sometimes erroneously used instead of port 8080 | Official | |
| 8000 | TCP | Commonly used for internet radio streams such as those using SHOUTcast | Unofficial | |
| 8000 | TCP | FreemakeVideoCapture service a part of Freemake Video Downloader [90] | Unofficial | |
| 8000 | TCP | Nortel Contivity Router Firewall User Authentication (FWUA) default port number | Unofficial | |
| 8001 | TCP | Commonly used for internet radio streams such as those using SHOUTcast | Unofficial | |
| 8002 | TCP | Cisco Systems Unified Call Manager Intercluster[citation needed] | Unofficial | |
| 8008 | TCP | HTTP Alternate | Official | |
| 8008 | TCP | IBM HTTP Server administration default | Unofficial | |
| 8009 | TCP | ajp13—Apache JServ Protocol AJP Connector | Unofficial | |
| 8010 | TCP | XMPP File transfers | Unofficial | |
| 8011-8013 | TCP | HTTP/TCP Symon Communications Event and Query Engine[citation needed] | Unofficial | |
| 8014 | TCP | HTTP/TCP Symon Communications Event and Query Engine[citation needed] | Unofficial | |
| 8014 | TCP | UDP | Perseus SDR Receiver default remote connection port[citation needed] | Unofficial |
| 8020 | TCP | 360Works SuperContainer[91] | Unofficial | |
| 8042 | TCP | Orthanc - Default HTTP Port for GUI | Unofficial | |
| 8069 | TCP | OpenERP Default HTTP port (web interface and xmlrpc calls) | Unofficial | |
| 8070 | TCP | OpenERP Legacy netrpc protocol | Unofficial | |
| 8074 | TCP | Gadu-Gadu | Unofficial | |
| 8075 | TCP | Killing Floor | Unofficial | |
| 8078 | TCP | UDP | Default port for most Endless Online-based servers[citation needed] | Unofficial |
| 8080 | TCP | HTTP alternate (http_alt)—commonly used for Web proxy and caching server, or for running a Web server as a non-root user | Official | |
| 8080 | TCP | Apache Tomcat | Unofficial | |
| 8080 | UDP | FilePhile Master/Relay | Unofficial | |
| 8080 | TCP | Vermont Systems / RecTrac Vermont Systems RecTrac (WebTrac) network installer | Unofficial | |
| 8081 | TCP | HTTP alternate, VibeStreamer, e.g. McAfee ePolicy Orchestrator (ePO) | Unofficial | |
| 8086 | TCP | HELM Web Host Automation Windows Control Panel | Unofficial | |
| 8086 | TCP | Kaspersky AV Control Center | Unofficial | |
| 8087 | TCP | Hosting Accelerator Control Panel | Unofficial | |
| 8087 | TCP | Parallels Plesk Control Panel | Unofficial | |
| 8087 | UDP | Kaspersky AV Control Center | Unofficial | |
| 8088 | TCP | Asterisk (PBX) Web Configuration utility (GUI Addon) | Unofficial | |
| 8089 | TCP | Splunk Daemon | Unofficial | |
| 8090 | TCP | HTTP Alternate (http_alt_alt)—used as an alternative to port 8080[citation needed] | Unofficial | |
| 8100 | TCP | Console Gateway License Verification | Unofficial | |
| 8111 | TCP | JOSM Remote Control | Unofficial | |
| 8116 | UDP | Check Point Cluster Control Protocol | Unofficial | |
| 8118 | TCP | Privoxy—advertisement-filtering Web proxy | Official | |
| 8123 | TCP | Polipo Web proxy | Official | |
| 8123 | TCP | Bukkit DynMap Default Webserver Bind Address | Unofficial | |
| 8192 | TCP | Sophos Remote Management System | Unofficial | |
| 8193 | TCP | Sophos Remote Management System | Unofficial | |
| 8194 | TCP | Sophos Remote Management System | Unofficial | |
| 8194 | TCP | Bloomberg Application[citation needed] | Unofficial | |
| 8195 | TCP | Bloomberg Application[citation needed] | Unofficial | |
| 8200 | TCP | GoToMyPC | Unofficial | |
| 8222 | TCP | VMware Server Management User Interface[92] (insecure Web interface).[93] See also port 8333 | Unofficial | |
| 8243 | TCP | UDP | HTTPS listener for Apache Synapse [94] | Official |
| 8280 | TCP | UDP | HTTP listener for Apache Synapse [94] | Official |
| 8291 | TCP | Winbox—Default on a MikroTik RouterOS for a Windows application used to administer MikroTik RouterOS[citation needed] | Unofficial | |
| 8303 | UDP | Teeworlds Server | Unofficial | |
| 8331 | TCP | MultiBit, [8] | Unofficial | |
| 8332 | TCP | Bitcoin JSON-RPC server[95] | Unofficial | |
| 8333 | TCP | Bitcoin[96] | Unofficial | |
| 8333 | TCP | VMware Server Management User Interface[92] (secure Web interface).[93] See also port 8222 | Unofficial | |
| 8400 | TCP | UDP | cvp, Commvault Unified Data Management | Official |
| 8442 | TCP | UDP | CyBro A-bus, Cybrotech Ltd. | Official |
| 8443 | TCP | SW Soft Plesk Control Panel, Apache Tomcat SSL, Promise WebPAM SSL, McAfee ePolicy Orchestrator (ePO) | Unofficial | |
| 8484 | TCP | UDP | MapleStory | Unofficial |
| 8500 | TCP | UDP | ColdFusion Macromedia/Adobe ColdFusion default and Duke Nukem 3D—default | Unofficial |
| 8501 | TCP | [9] DukesterX —default[citation needed] | Unofficial | |
| 8601 | TCP | Wavestore CCTV protocol[97] | Unofficial | |
| 8602 | TCP | UDP | Wavestore Notification protocol[97] | Unofficial |
| 8642 | TCP | Lotus Traveller[citation needed] | Unofficial | |
| 8691 | TCP | Ultra Fractal default server port for distributing calculations over network computers | Unofficial | |
| 8701 | UDP | SoftPerfect Bandwidth Manager | Unofficial | |
| 8702 | UDP | SoftPerfect Bandwidth Manager | Unofficial | |
| 8767 | UDP | TeamSpeak—default | Unofficial | |
| 8768 | UDP | TeamSpeak—alternate | Unofficial | |
| 8778 | TCP | EPOS Speech Synthesis System | Unofficial | |
| 8834 | Nessus web | Unofficial | ||
| 8840 | TCP | Opera Unite server | Unofficial | |
| 8880 | UDP | cddbp-alt, CD DataBase (CDDB) protocol (CDDBP) alternate | Official | |
| 8880 | TCP | cddbp-alt, CD DataBase (CDDB) protocol (CDDBP) alternate | Official | |
| 8880 | TCP | WebSphere Application Server SOAP connector default | Unofficial | |
| 8880 | TCP | Win Media Streamer to Server SOAP connector default | Unofficial | |
| 8881 | TCP | Atlasz Informatics Research Ltd Secure Application Server[citation needed] | Unofficial | |
| 8881 | TCP | Netflexity Inc QFlex - IBM WebSphere MQ monitoring software. | Unofficial | |
| 8882 | TCP | Atlasz Informatics Research Ltd Secure Application Server[citation needed] | Unofficial | |
| 8883 | TCP | UDP | Secure MQ Telemetry Transport (MQTT over SSL) | Official |
| 8886 | TCP | PPM3 (Padtec Management Protocol version 3) | Unofficial | |
| 8887 | TCP | HyperVM HTTP | Official | |
| 8888 | TCP | HyperVM HTTPS | Official | |
| 8888 | TCP | Freenet HTTP | Unofficial | |
| 8888 | TCP | UDP | NewsEDGE server | Official |
| 8888 | TCP | Sun Answerbook dwhttpd server (deprecated by docs.sun.com) | Unofficial | |
| 8888 | TCP | GNUmp3d HTTP music streaming and Web interface | Unofficial | |
| 8888 | TCP | LoLo Catcher HTTP Web interface (www.optiform.com) | Unofficial | |
| 8888 | TCP | D2GS Admin Console Telnet administration console for D2GS servers (Diablo 2) | Unofficial | |
| 8888 | TCP | Earthland Relams 2 Server (AU1_2)[citation needed] | Unofficial | |
| 8888 | TCP | MAMP Server | Unofficial | |
| 8889 | TCP | MAMP Server | Unofficial | |
| 8889 | TCP | Earthland Relams 2 Server (AU1_1)[citation needed] | Unofficial | |
| 8937 | TCP | Transaction Warehouse Data Service (TWDS) | Official | |
| 8983 | TCP | Default for Apache Solr [98] | Unofficial | |
| 8998 | TCP | I2P Monotone Repository | Unofficial | |
| 9000 | TCP | Buffalo LinkSystem Web access[citation needed] | Unofficial | |
| 9000 | TCP | DBGp | Unofficial | |
| 9000 | TCP | SqueezeCenter web server & streaming | Unofficial | |
| 9000 | UDP | UDPCast | Unofficial | |
| 9000 | TCP | Play! Framework web server[citation needed] | Unofficial | |
| 9001 | TCP | UDP | ETL Service Manager[99] | Official |
| 9001 | Microsoft SharePoint authoring environment | Unofficial | ||
| 9001 | cisco-xremote router configuration[citation needed] | Unofficial | ||
| 9001 | Tor network default | Unofficial | ||
| 9001 | TCP | DBGp Proxy | Unofficial | |
| 9001 | TCP | HSQLDB default port | Unofficial | |
| 9002 | Newforma Server comms | Unofficial | ||
| 9009 | TCP | UDP | Pichat Server—Peer to peer chat software | Official |
| 9010 | TCP | TISERVICEMANAGEMENT Numara Track-It! | Unofficial | |
| 9020 | TCP | WiT WiT Services | Official | |
| 9025 | TCP | WiT WiT Services | Official | |
| 9030 | TCP | Tor often used | Unofficial | |
| 9043 | TCP | WebSphere Application Server Administration Console secure | Unofficial | |
| 9050 | TCP | Tor | Unofficial | |
| 9051 | TCP | Tor | Unofficial | |
| 9060 | TCP | WebSphere Application Server Administration Console | Unofficial | |
| 9080 | UDP | glrpc, Groove Collaboration software GLRPC | Official | |
| 9080 | TCP | glrpc, Groove Collaboration software GLRPC | Official | |
| 9080 | TCP | WebSphere Application Server HTTP Transport (port 1) default | Unofficial | |
| 9090 | TCP | UDP | WebSM | Unofficial |
| 9090 | TCP | Webwasher, Secure Web, McAfee Web Gateway - Default Proxy Port[citation needed] | Unofficial | |
| 9090 | TCP | Openfire Administration Console | Unofficial | |
| 9090 | TCP | SqueezeCenter control (CLI) | Unofficial | |
| 9091 | TCP | Openfire Administration Console (SSL Secured) | Unofficial | |
| 9091 | TCP | Transmission (BitTorrent client) Web Interface | Unofficial | |
| 9100 | TCP | PDL Data Stream | Official | |
| 9101 | TCP | UDP | Bacula Director | Official |
| 9102 | TCP | UDP | Bacula File Daemon | Official |
| 9103 | TCP | UDP | Bacula Storage Daemon | Official |
| 9105 | TCP | UDP | Xadmin Control Daemon | Official |
| 9106 | TCP | UDP | Astergate Control Daemon | Official |
| 9107 | TCP | Astergate-FAX Control Daemon | Official | |
| 9110 | UDP | SSMP Message protocol | Unofficial | |
| 9119 | TCP | UDP | MXit Instant Messenger | Official |
| 9191 | TCP | Catamount Software - PocketMoney Sync[citation needed] | Unofficial | |
| 9199 | TCP | Avtex LLC - qStats | Unofficial | |
| 9293 | TCP | Sony PlayStation RemotePlay[100] | Unofficial | |
| 9300 | TCP | IBM Cognos 8 SOAP Business Intelligence and Performance Management | Unofficial | |
| 9303 | UDP | D-Link Shareport Share storage and MFP printers | Unofficial | |
| 9309 | TCP | UDP | Sony PlayStation Vita Host Collaboration WiFi Data Transfer[101] | Unofficial |
| 9306 | TCP | Sphinx Native API | Official | |
| 9312 | TCP | Sphinx SphinxQL | Official | |
| 9418 | TCP | UDP | git, Git pack transfer service | Official |
| 9420 | TCP | MooseFS distributed file system—master server to chunk servers | Unofficial | |
| 9421 | TCP | MooseFS distributed file system—master server to clients | Unofficial | |
| 9422 | TCP | MooseFS distributed file system—chunk servers to clients | Unofficial | |
| 9535 | TCP | UDP | mngsuite, LANDesk Management Suite Remote Control | Official |
| 9536 | TCP | UDP | laes-bf, IP Fabrics Surveillance buffering function | Official |
| 9600 | UDP | Omron FINS, OMRON FINS PLC communication | Official | |
| 9675 | TCP | UDP | Spiceworks Desktop, IT Helpdesk Software | Unofficial |
| 9676 | TCP | UDP | Spiceworks Desktop, IT Helpdesk Software | Unofficial |
| 9695 | UDP | CCNx | Official | |
| 9800 | TCP | UDP | WebDAV Source | Official |
| 9800 | WebCT e-learning portal | Unofficial | ||
| 9875 | TCP | Club Penguin Disney online game for kids | Unofficial | |
| 9898 | UDP | MonkeyCom[citation needed] | Official | |
| 9898 | TCP | MonkeyCom[citation needed] | Official | |
| 9898 | TCP | Tripwire—File Integrity Monitoring Software[citation needed] | Unofficial | |
| 9987 | UDP | TeamSpeak 3 server default (voice) port (for the conflicting service see the IANA list) | Unofficial | |
| 9996 | TCP | UDP | Ryan's App "Ryan's App" Trading Software | Official |
| 9996 | TCP | UDP | The Palace "The Palace" Virtual Reality Chat software.—5 | Official |
| 9998 | TCP | UDP | The Palace "The Palace" Virtual Reality Chat software.—5 | Official |
| 9999 | Hydranode—edonkey2000 TELNET control | Unofficial | ||
| 9999 | TCP | Lantronix UDS-10/UDS100[102] RS-485 to Ethernet Converter TELNET control | Unofficial | |
| 9999 | Urchin Web Analytics[citation needed] | Unofficial | ||
| 10000 | Webmin—Web-based administration tool for Unix-like systems | Unofficial | ||
| 10000 | BackupExec | Unofficial | ||
| 10000 | Ericsson Account Manager (avim)[citation needed] | Unofficial | ||
| 10001 | TCP | Lantronix UDS-10/UDS100[103] RS-485 to Ethernet Converter default | Unofficial | |
| 10008 | TCP | UDP | Octopus Multiplexer, primary port for the CROMP protocol, which provides a platform-independent means for communication of objects across a network | Official |
| 10009 | TCP | UDP | Cross Fire, a multiplayer online First Person Shooter[citation needed] | Unofficial |
| 10010 | TCP | Open Object Rexx (ooRexx) rxapi daemon | Official | |
| 10017 | AIX,NeXT, HPUX—rexd daemon control[citation needed] | Unofficial | ||
| 10024 | TCP | Zimbra smtp [mta]—to amavis from postfix[citation needed] | Unofficial | |
| 10025 | TCP | Zimbra smtp [mta]—back to postfix from amavis[citation needed] | Unofficial | |
| 10050 | TCP | UDP | Zabbix-Agent | Official |
| 10051 | TCP | UDP | Zabbix-Trapper | Official |
| 10110 | TCP | UDP | NMEA 0183 Navigational Data. Transport of NMEA 0183 sentences over TCP or UDP | Official |
| 10113 | TCP | UDP | NetIQ Endpoint | Official |
| 10114 | TCP | UDP | NetIQ Qcheck | Official |
| 10115 | TCP | UDP | NetIQ Endpoint | Official |
| 10116 | TCP | UDP | NetIQ VoIP Assessor | Official |
| 10172 | TCP | Intuit Quickbooks client | Unofficial | |
| 10200 | TCP | FRISK Software International's fpscand virus scanning daemon for Unix platforms [104] | Unofficial | |
| 10200 | TCP | FRISK Software International's f-protd virus scanning daemon for Unix platforms [105] | Unofficial | |
| 10201–10204 | TCP | FRISK Software International's f-protd virus scanning daemon for Unix platforms [105] | Unofficial | |
| 10301 | TCP | VoiceIP-ACS UMP default device provisioning endpoint[citation needed] | Unofficial | |
| 10302 | TCP | VoiceIP-ACS UMP default device provisioning endpoint (SSL)[citation needed] | Unofficial | |
| 10308 | Lock-on: Modern Air Combat[citation needed] | Unofficial | ||
| 10480 | SWAT 4 Dedicated Server[citation needed] | Unofficial | ||
| 10823 | UDP | Farming Simulator 2011 Default Server[citation needed] | Unofficial | |
| 10891 | TCP | Jungle Disk (this port is opened by the Jungle Disk Monitor service on the localhost)[citation needed] | Unofficial | |
| 11001 | TCP | UDP | metasys ( Johnson Controls Metasys java AC control environment )[citation needed] | Unofficial |
| 11112 | TCP | UDP | ACR/NEMA Digital Imaging and Communications in Medicine (DICOM) | Official |
| 11155 | TCP | UDP | Tunngle | Unofficial |
| 11211 | TCP | UDP | memcached | Unofficial |
| 11235 | Savage:Battle for Newerth Server Hosting[citation needed] | Unofficial | ||
| 11294 | Blood Quest Online Server[citation needed] | Unofficial | ||
| 11371 | OpenPGP HTTP key server | Official | ||
| 11576 | IPStor Server management communication | Unofficial | ||
| 12010 | TCP | ElevateDB default database port [106] | Unofficial | |
| 12011 | TCP | Axence nVision [56] | Unofficial | |
| 12012 | TCP | Axence nVision [56] | Unofficial | |
| 12012 | TCP | Audition Online Dance Battle, Korea Server—Status/Version Check | Unofficial | |
| 12012 | UDP | Audition Online Dance Battle, Korea Server—Status/Version Check | Unofficial | |
| 12013 | TCP | UDP | Audition Online Dance Battle, Korea Server | Unofficial |
| 12035 | UDP | Linden Lab viewer to sim on SecondLife[citation needed] | Unofficial | |
| 12201 | UDP | GELF Protocol | Unofficial | |
| 12222 | UDP | Light Weight Access Point Protocol (LWAPP) LWAPP data (RFC 5412) | Official | |
| 12223 | UDP | Light Weight Access Point Protocol (LWAPP) LWAPP control (RFC 5412) | Official | |
| 12345 | NetBus—remote administration tool (often Trojan horse). Also used by NetBuster. Little Fighter 2 (TCP). | Unofficial | ||
| 12489 | TCP | NSClient/NSClient++/NC_Net (Nagios) | Unofficial | |
| 12975 | TCP | LogMeIn Hamachi (VPN tunnel software; also port 32976)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect | Unofficial | |
| 12998–12999 | UDP | Takenaka RDI Mirror World on SecondLife[citation needed] | Unofficial | |
| 13000–13050 | UDP | Linden Lab viewer to sim on SecondLife[citation needed] | Unofficial | |
| 13008 | TCP | UDP | Cross Fire, a multiplayer online First Person Shooter[citation needed] | Unofficial |
| 13075 | TCP | Default[107] for BMC Software Control-M/Enterprise Manager Corba communication, though often changed during installation | Official | |
| 13195-13196 | TCP | UDP | Ontolux Ontolux 2D | Unofficial |
| 13337-13340 | TCP | UDP | ÆtherNet peer-to-peer networking[citation needed] | Unofficial |
| 13720 | TCP | UDP | Symantec NetBackup—bprd (formerly VERITAS) | Official |
| 13721 | TCP | UDP | Symantec NetBackup—bpdbm (formerly VERITAS) | Official |
| 13724 | TCP | UDP | Symantec Network Utility—vnetd (formerly VERITAS) | Official |
| 13782 | TCP | UDP | Symantec NetBackup—bpcd (formerly VERITAS) | Official |
| 13783 | TCP | UDP | Symantec VOPIED protocol (formerly VERITAS) | Official |
| 13785 | TCP | UDP | Symantec NetBackup Database—nbdb (formerly VERITAS) | Official |
| 13786 | TCP | UDP | Symantec nomdb (formerly VERITAS) | Official |
| 14439 | TCP | APRS UI-View Amateur Radio[108] UI-WebServer | Unofficial | |
| 14567 | UDP | Battlefield 1942 and mods | Unofficial | |
| 14900 | TCP | K3 SYSPRO K3 Framework WCF Backbone[citation needed] | Unofficial | |
| 15000 | TCP | psyBNC | Unofficial | |
| 15000 | TCP | Wesnoth | Unofficial | |
| 15000 | TCP | Kaspersky Network Agent[citation needed] | Unofficial | |
| 15000 | TCP | hydap, Hypack Hydrographic Software Packages Data Acquisition | Official | |
| 15000 | UDP | hydap, Hypack Hydrographic Software Packages Data Acquisition | Official | |
| 15556 | TCP | UDP | Jeex.EU Artesia (direct client-to-db.service) | Unofficial |
| 15567 | UDP | Battlefield Vietnam and mods | Unofficial | |
| 15345 | TCP | UDP | XPilot Contact | Official |
| 16000 | TCP | shroudBNC | Unofficial | |
| 16080 | TCP | Mac OS X Server Web (HTTP) service with performance cache[109] | Unofficial | |
| 16200 | TCP | Oracle Universal Content Management Content Server | Unofficial | |
| 16250 | TCP | Oracle Universal Content Management Inbound Refinery | Unofficial | |
| 16384 | UDP | Iron Mountain Digital online backup[citation needed] | Unofficial | |
| 16567 | UDP | Battlefield 2 and mods | Unofficial | |
| 17500 | TCP | UDP | Dropbox LanSync Protocol (db-lsp); used to synchronize file catalogs between Dropbox clients on your local network. | Official |
| 18010 | TCP | Super Dancer Online Extreme(SDO-X)—CiB Net Station Malaysia Server[citation needed] | Unofficial | |
| 18104 | TCP | RAD PDF Service | Official | |
| 18180 | TCP | DART Reporting server[citation needed] | Unofficial | |
| 18200 | TCP | UDP | Audition Online Dance Battle, AsiaSoft Thailand Server—Status/Version Check | Unofficial |
| 18201 | TCP | UDP | Audition Online Dance Battle, AsiaSoft Thailand Server | Unofficial |
| 18206 | TCP | UDP | Audition Online Dance Battle, AsiaSoft Thailand Server—FAM Database | Unofficial |
| 18300 | TCP | UDP | Audition Online Dance Battle, AsiaSoft SEA Server—Status/Version Check | Unofficial |
| 18301 | TCP | UDP | Audition Online Dance Battle, AsiaSoft SEA Server | Unofficial |
| 18306 | TCP | UDP | Audition Online Dance Battle, AsiaSoft SEA Server—FAM Database | Unofficial |
| 18333 | TCP | Bitcoin testnet[96] | Unofficial | |
| 18400 | TCP | UDP | Audition Online Dance Battle, KAIZEN Brazil Server—Status/Version Check | Unofficial |
| 18401 | TCP | UDP | Audition Online Dance Battle, KAIZEN Brazil Server | Unofficial |
| 18505 | TCP | UDP | Audition Online Dance Battle R4p3 Server, Nexon Server—Status/Version Check | Unofficial R4p3 Server |
| 18506 | TCP | UDP | Audition Online Dance Battle, Nexon Server | Unofficial |
| 18605 | TCP | UDP | X-BEAT—Status/Version Check | Unofficial |
| 18606 | TCP | UDP | X-BEAT | Unofficial |
| 19000 | TCP | UDP | Audition Online Dance Battle, G10/alaplaya Server—Status/Version Check | Unofficial |
| 19000 | UDP | JACK sound server | Unofficial | |
| 19001 | TCP | UDP | Audition Online Dance Battle, G10/alaplaya Server | Unofficial |
| 19150 | TCP | UDP | Gkrellm Server | Unofficial |
| 19226 | TCP | Panda Software AdminSecure Communication Agent | Unofficial | |
| 19283 | TCP | UDP | K2 - KeyAuditor & KeyServer, Sassafras Software Inc. Software Asset Management tools | Official |
| 19294 | TCP | Google Talk Voice and Video connections [110] | Unofficial | |
| 19295 | UDP | Google Talk Voice and Video connections [110] | Unofficial | |
| 19302 | UDP | Google Talk Voice and Video connections [110] | Unofficial | |
| 19315 | TCP | UDP | KeyShadow for K2 - KeyAuditor & KeyServer, Sassafras Software Inc. Software Asset Management tools | Official |
| 19540 | TCP | UDP | Belkin Network USB Hub[citation needed] | Unofficial |
| 19638 | TCP | Ensim Control Panel[citation needed] | Unofficial | |
| 19812 | TCP | 4D database SQL Communication[citation needed] | Unofficial | |
| 19813 | TCP | 4D database Client Server Communication[citation needed] | Unofficial | |
| 19814 | TCP | 4D database DB4D Communication[citation needed] | Unofficial | |
| 19999 | DNP - Secure (Distributed Network Protocol - Secure), a secure version of the protocol used in SCADA systems between communicating RTU's and IED's | Official | ||
| 20000 | DNP (Distributed Network Protocol), a protocol used in SCADA systems between communicating RTU's and IED's | Official | ||
| 20000 | Usermin, Web-based user tool | Unofficial | ||
| 20014 | TCP | DART Reporting server[citation needed] | Unofficial | |
| 20560 | TCP | UDP | Killing Floor | Unofficial |
| 20702 | TCP | Precise TPM Listener Agent | Unofficial | |
| 20720 | TCP | Symantec i3 Web GUI server | Unofficial | |
| 20790 | TCP | Precise TPM Web GUI server | Unofficial | |
| 21001 | TCP | AMLFilter, AMLFilter Inc. amlf-admin default port | Unofficial | |
| 21011 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-01 default http port | Unofficial | |
| 21012 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-01 default https port | Unofficial | |
| 21021 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-02 default http port | Unofficial | |
| 21022 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-02 default https port | Unofficial | |
| 22136 | TCP | FLIR Systems Camera Resource Protocol | Unofficial | |
| 22222 | TCP | Davis Instruments, WeatherLink IP | Unofficial | |
| 22347 | TCP | UDP | WibuKey, WIBU-SYSTEMS AG Software protection system | Official |
| 22349 | TCP | Wolfson Microelectronics WISCEBridge Debug Protocol[111] | Unofficial | |
| 22350 | TCP | UDP | CodeMeter, WIBU-SYSTEMS AG Software protection system | Official |
| 23073 | Soldat Dedicated Server | Unofficial | ||
| 23399 | Skype Default Protocol | Unofficial | ||
| 23513 | Duke Nukem 3D#Source code Duke Nukem Ports | Unofficial | ||
| 24444 | NetBeans integrated development environment | Unofficial | ||
| 24465 | TCP | UDP | Tonido Directory Server for Tonido which is a Personal Web App and P2P platform | Official |
| 24554 | TCP | UDP | BINKP, Fidonet mail transfers over TCP/IP | Official |
| 24800 | Synergy: keyboard/mouse sharing software | Unofficial | ||
| 24842 | StepMania: Online: Dance Dance Revolution Simulator | Unofficial | ||
| 25000 | TCP | Teamware Office standard client connection | Official | |
| 25003 | TCP | Teamware Office client notifier | Official | |
| 25005 | TCP | Teamware Office message transfer | Official | |
| 25007 | TCP | Teamware Office MIME Connector | Official | |
| 25010 | TCP | Teamware Office Agent server | Official | |
| 25560 | TCP | codeheart.js Relay Server | Unofficial | |
| 25565 | TCP | Standard Minecraft (Dedicated) Server | Unofficial | |
| 25565 | MySQL Standard MySQL port | Unofficial | ||
| 25570 | Manic Digger default single player port | Unofficial | ||
| 25826 | UDP | collectd default port[112] | Unofficial | |
| 25888 | UDP | Xfire (Firewall Report, UDP_IN) IP Address (206.220.40.146) resolves to gameservertracking.xfire.com. Use unknown. | Unofficial | |
| 25999 | TCP | Xfire | Unofficial | |
| 26000 | UDP | id Software's Quake server | Official | |
| 26000 | TCP | id Software's Quake server | Official | |
| 26000 | TCP | CCP's EVE Online Online gaming MMORPG | Unofficial | |
| 26850 | TCP | War of No Return Server Port[citation needed] | Unofficial | |
| 26900 | TCP | CCP's EVE Online Online gaming MMORPG | Unofficial | |
| 26901 | TCP | CCP's EVE Online Online gaming MMORPG | Unofficial | |
| 27000-27030 | UDP | Steam Client | Unofficial | |
| 27000 | UDP | (through 27006) id Software's QuakeWorld master server | Unofficial | |
| 27000-27009 | TCP | FlexNet Publisher's License server (from the range of default ports) | Unofficial | |
| 27010 | Source engine dedicated server port | Unofficial | ||
| 27014-27050 | TCP | Steam Downloads | Unofficial | |
| 27014 | Source engine dedicated server port (rare) | Unofficial | ||
| 27015 | GoldSrc and Source engine dedicated server port | Unofficial | ||
| 27016 | Magicka server port | Unofficial | ||
| 27017 | mongoDB server port | Unofficial | ||
| 27374 | Sub7 default. | Unofficial | ||
| 27500-27900 | UDP | id Software's QuakeWorld | Unofficial | |
| 27888 | UDP | Kaillera server | Unofficial | |
| 27900-27901 | Nintendo Wi-Fi Connection | Unofficial | ||
| 27901-27910 | UDP | id Software's Quake II master server | Unofficial | |
| 27950 | UDP | OpenArena outgoing | Unofficial | |
| 27960-27969 | UDP | Activision's Enemy Territory and id Software's Quake III Arena, Quake III and Quake Live and some ioquake3 derived games (OpenArena incoming) | Unofficial | |
| 28000 | Bitfighter Common/default Bitfighter Server | Unofficial | ||
| 28001 | Starsiege: Tribes Common/default Tribes v.1 Server | Unofficial | ||
| 28395 | TCP | www.SmartSystemsLLC.com Used by Smart Sale 5.0[citation needed] | Unofficial | |
| 28785 | UDP | Cube 2 Sauerbraten[113] | Unofficial | |
| 28786 | UDP | Cube 2 Sauerbraten Port 2[113] | Unofficial | |
| 28852 | TCP | UDP | Killing Floor | Unofficial |
| 28910 | Nintendo Wi-Fi Connection[114] | Unofficial | ||
| 28960 | UDP | Call of Duty; Call of Duty: United Offensive; Call of Duty 2; Call of Duty 4: Modern Warfare; Call of Duty: World at War (PC Version) | Unofficial | |
| 29000 | Perfect World International Used by the Perfect World International Client | Unofficial | ||
| 29070 | TCP | UDP | Game titled "Jedi Knight: Jedi Academy" by Ravensoft | Unofficial |
| 29292 | TCP | TMO Integration Service Communications Port, Used by Transaction Manager SaaS (HighJump Software)[citation needed] | Unofficial | |
| 29900-29901 | Nintendo Wi-Fi Connection[114] | Unofficial | ||
| 29920 | Nintendo Wi-Fi Connection[114] | Unofficial | ||
| 30000 | Pokémon Netbattle | Unofficial | ||
| 30301 | BitTorrent | Unofficial | ||
| 30564 | TCP | Multiplicity: keyboard/mouse/clipboard sharing software | Unofficial | |
| 30718 | UDP | Lantronix Discovery for Lantronix serial-to-ethernet devices | Unofficial | |
| 30777 | TCP | ZangZing agent | Unofficial | |
| 31314 | TCP | electric imp node<>server communication (TLS) | Unofficial | |
| 31337 | TCP | Back Orifice—remote administration tool (often Trojan horse) | Unofficial | |
| 31415 | ThoughtSignal—Server Communication Service (often Informational) | Unofficial | ||
| 31456 | TCP | TetriNET IRC gateway on some servers | Unofficial | |
| 31457 | TCP | TetriNET | Official | |
| 31458 | TCP | TetriNET Used for game spectators | Unofficial | |
| 31620 | TCP | UDP | LM-MON (Standard Floating License Manager LM-MON) | Official |
| 32123 | TCP | x3Lobby Used by x3Lobby, an internet application. | Unofficial | |
| 32137 | TCP | UDP | Immunet Protect (UDP in version 2.0,[115] TCP since version 3.0[116]) | Unofficial |
| 32245 | TCP | MMTSG-mutualed over MMT (encrypted transmission) | Unofficial | |
| 32769 | TCP | FileNet RPC | Unofficial | |
| 32887 | TCP | Used by "Ace of Spades" game | Unofficial | |
| 32976 | TCP | LogMeIn Hamachi (VPN tunnel software; also port 12975)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect | Unofficial | |
| 33434 | TCP | UDP | traceroute | Official |
| 33982 | TCP | UDP | Dezta software | Unofficial |
| 34443 | Linksys PSUS4 print server[citation needed] | Unofficial | ||
| 34567 | TCP | EDI service[117] | Official | |
| 36330 | TCP | Folding@home v7 default for client control interface | Unofficial | |
| 36963 | UDP | Any of the USGN online games, most notably Counter Strike 2D multiplayer (2D clone of popular CounterStrike computer game) | Unofficial | |
| 37659 | TCP | Axence nVision[citation needed] | Unofficial | |
| 37777 | TCP | Digital Video Recorder hardware[citation needed] | Unofficial | |
| 40000 | TCP | UDP | SafetyNET p Real-time Industrial Ethernet protocol | Official |
| 40123 | UDP | Flatcast[118] | Unofficial | |
| 41823 | TCP | UDP | Murealm Client[citation needed] | Unofficial |
| 43047 | TCP | TheòsMessenger second port for service TheòsMessenger[citation needed] | Official | |
| 43034 | TCP | UDP | LarmX.com™ database update mtr port[citation needed] | Unofficial |
| 43048 | TCP | TheòsMessenger third port for service TheòsMessenger[citation needed] | Official | |
| 43594 | TCP | RuneScape, FunOrb, Runescape Private Servers game servers | Unofficial | |
| 43595 | TCP | RuneScape JAGGRAB servers | Unofficial | |
| 45824 | TCP | Server for the DAI family of client-server products[citation needed] | Official | |
| 47001 | TCP | WinRM - Windows Remote Management Service [119] | Official | |
| 47808 | TCP | UDP | BACnet Building Automation and Control Networks (4780810 = BAC016) | Official |
| 49151 | TCP | UDP | Reserved[1] | Official |
| 44405 | TCP | Mu Online Connect Server | Unofficial | |
| 55901 | TCP | Mu Online Game Server | Unofficial | |