Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-15
Expert(s)
- TCP/UDP: Joe Touch; Eliot Lear, Kumiko Ono, Wes Eddy, Brian Trammell, and Michael Scharf
- SCTP: Michael Tuexen
- DCCP: Eddie Kohler and Yoshifumi Nishida
Reference
- RFC 6335: Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry
Note
Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP.
Service names are assigned on a First Come First Served basis, as described in RFC 6335.
Port numbers are divided into three ranges, with their uses and assignment procedures specified in Section 8.1.2 of RFC 6335:
- System Ports (0-1023) are assigned using the IETF Review or IESG Approval procedures.
- User Ports (1024-49151) are assigned using the IETF Review, IESG Approval, or Expert Review procedures.
- Dynamic and/or Private Ports (49152-65535) are not assigned.
The registration procedures for service names and port numbers are specified in RFC 6335, while the registration policies referenced above are defined in RFC 8126.
Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA registration.
Assignment of a port number does not in any way imply an endorsement of an application or product, and the fact that network traffic is flowing to or from a registered port does not mean that it is "good" traffic, nor that it necessarily corresponds to the assigned service. Firewall and system administrators should choose how to configure their systems based on their knowledge of the traffic in question, not whether there is a port number registered or not.
Registration Forms
- To request a new assignment, please use the Application for Service Names and User Port Numbers form.
- To modify an existing assignment, please use the Modify a Port Number Assignment form.
Available Formats
| Service Name | Port Number | Transport Protocol | Description | Assignee | Contact | Registration Date | Modification Date | Reference | Service Code | Unauthorized Use Reported | Assignment Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| netopia-vo3 | 1841 | tcp | netopia-vo3 | ||||||||
| netopia-vo3 | 1841 | udp | netopia-vo3 | ||||||||
| netopia-vo5 | 1843 | tcp | netopia-vo5 | Marc Epard | Marc Epard | ||||||
| netopia-vo5 | 1843 | udp | netopia-vo5 | Marc Epard | Marc Epard | ||||||
| slp-notify | 1847 | tcp | SLP Notification | RFC 3082 | |||||||
| slp-notify | 1847 | udp | SLP Notification | RFC 3082 | |||||||
| vids-avtp | 1853 | tcp | VIDS-AVTP | Sascha Kuemmel | Sascha Kuemmel | ||||||
| vids-avtp | 1853 | udp | VIDS-AVTP | Sascha Kuemmel | Sascha Kuemmel | ||||||
| msnp | 1863 | tcp | MSNP | William Lai | William Lai | ||||||
| msnp | 1863 | udp | MSNP | William Lai | William Lai | ||||||
| paradym-31port | 1864 | tcp | Paradym 31 Port | David Wooden | David Wooden | ||||||
| paradym-31port | 1864 | udp | Paradym 31 Port | David Wooden | David Wooden | ||||||
| fjmpjps | 1873 | tcp | Fjmpjps | ||||||||
| fjmpjps | 1873 | udp | Fjmpjps | ||||||||
| mqtt | 1883 | tcp | Message Queuing Telemetry Transport Protocol | OASIS | Robin Cover | 2015-02-10 | |||||
| mqtt | 1883 | udp | Message Queuing Telemetry Transport Protocol | OASIS | Robin Cover | 2015-02-10 | |||||
| elad | 1893 | tcp | ELAD Protocol | Franco Milan | Franco Milan | ||||||
| elad | 1893 | udp | ELAD Protocol | Franco Milan | Franco Milan | ||||||
| linkname | 1903 | tcp | Local Link Name Resolution | Dan Harrington | Dan Harrington | ||||||
| linkname | 1903 | udp | Local Link Name Resolution | Dan Harrington | Dan Harrington | ||||||
| armadp | 1913 | tcp | armadp | Kevin Welton | Kevin Welton | ||||||
| armadp | 1913 | udp | armadp | Kevin Welton | Kevin Welton | ||||||
| spice | 1923 | tcp | SPICE | Nicholas Chua | Nicholas Chua | ||||||
| spice | 1923 | udp | SPICE | Nicholas Chua | Nicholas Chua | ||||||
| driveappserver | 1930 | tcp | Drive AppServer | Andrew Johnson | Andrew Johnson | ||||||
| driveappserver | 1930 | udp | Drive AppServer | Andrew Johnson | Andrew Johnson | ||||||
| amdsched | 1931 | tcp | AMD SCHED | Michael Walsh | Michael Walsh | ||||||
| amdsched | 1931 | udp | AMD SCHED | Michael Walsh | Michael Walsh | ||||||
| ctt-broker | 1932 | tcp | CTT Broker | Jens Edlund | Jens Edlund | ||||||
| ctt-broker | 1932 | udp | CTT Broker | Jens Edlund | Jens Edlund | ||||||
| xmapi | 1933 | tcp | IBM LM MT Agent | ||||||||
| xmapi | 1933 | udp | IBM LM MT Agent | ||||||||
| xaapi | 1934 | tcp | IBM LM Appl Agent | Helga Wolin | Helga Wolin | ||||||
| xaapi | 1934 | udp | IBM LM Appl Agent | Helga Wolin | Helga Wolin | ||||||
| macromedia-fcs | 1935 | tcp | Macromedia Flash Communications Server MX | Pritham Shetty | Pritham Shetty | ||||||
| macromedia-fcs | 1935 | udp | Macromedia Flash Communications server MX | Pritham Shetty | Pritham Shetty | ||||||
| jetcmeserver | 1936 | tcp | JetCmeServer Server Port | ||||||||
| jetcmeserver | 1936 | udp | JetCmeServer Server Port | ||||||||
| jwserver | 1937 | tcp | JetVWay Server Port | ||||||||
| jwserver | 1937 | udp | JetVWay Server Port | ||||||||
| jwclient | 1938 | tcp | JetVWay Client Port | ||||||||
| jwclient | 1938 | udp | JetVWay Client Port | ||||||||
| jvserver | 1939 | tcp | JetVision Server Port | ||||||||
| jvserver | 1939 | udp | JetVision Server Port | ||||||||
| beeyond-media | 1943 | tcp | Beeyond Media | Bob Deblier | Bob Deblier | ||||||
| beeyond-media | 1943 | udp | Beeyond Media | Bob Deblier | Bob Deblier | ||||||
| rapidbase | 1953 | tcp | Rapid Base | Antoni Wolski | Antoni Wolski | ||||||
| rapidbase | 1953 | udp | Rapid Base | Antoni Wolski | Antoni Wolski | ||||||
| webmachine | 1963 | tcp | WebMachine | Tim Jowers | Tim Jowers | ||||||
| webmachine | 1963 | udp | WebMachine | Tim Jowers | Tim Jowers | ||||||
| dlsrap | 1973 | tcp | Data Link Switching Remote Access Protocol | Steve T. Chiang | Steve T. Chiang | ||||||
| dlsrap | 1973 | udp | Data Link Switching Remote Access Protocol | Steve T. Chiang | Steve T. Chiang | ||||||
| lhtp | 1983 | tcp | Loophole Test Protocol | Kade Hansson | Kade Hansson | ||||||
| lhtp | 1983 | udp | Loophole Test Protocol | Kade Hansson | Kade Hansson | ||||||
| tr-rsrb-p3 | 1989 | tcp | cisco RSRB Priority 3 port | ||||||||
| tr-rsrb-p3 | 1989 | udp | cisco RSRB Priority 3 port | ||||||||
| stun-p3 | 1992 | tcp | cisco STUN Priority 3 port | ||||||||
| stun-p3 | 1992 | udp | cisco STUN Priority 3 port | ||||||||
| snmp-tcp-port | 1993 | tcp | cisco SNMP TCP port | ||||||||
| snmp-tcp-port | 1993 | udp | cisco SNMP TCP port | ||||||||
| brutus | 2003 | tcp | Brutus Server | Johannes Skov Frandsen | Johannes Skov Frandsen | 2008-02-28 | |||||
| brutus | 2003 | udp | Brutus Server | Johannes Skov Frandsen | Johannes Skov Frandsen | 2008-02-28 | |||||
| raid-am | 2013 | tcp | |||||||||
| raid-cd | 2013 | udp | |||||||||
| xinuexpansion3 | 2023 | tcp | |||||||||
| xinuexpansion3 | 2023 | udp | |||||||||
| device2 | 2030 | tcp | |||||||||
| device2 | 2030 | udp | |||||||||
| mobrien-chat | 2031 | tcp | mobrien-chat | Mike O'Brien | Mike O'Brien | 2004-11 | |||||
| mobrien-chat | 2031 | udp | mobrien-chat | Mike O'Brien | Mike O'Brien | 2004-11 | |||||
| blackboard | 2032 | tcp | |||||||||
| blackboard | 2032 | udp | |||||||||
| glogger | 2033 | tcp | |||||||||
| glogger | 2033 | udp | |||||||||
| scoremgr | 2034 | tcp | |||||||||
| scoremgr | 2034 | udp | |||||||||
| imsldoc | 2035 | tcp | |||||||||
| imsldoc | 2035 | udp | |||||||||
| e-dpnet | 2036 | tcp | Ethernet WS DP network | Peter Kaever | Peter Kaever | 2005-08 | |||||
| e-dpnet | 2036 | udp | Ethernet WS DP network | Peter Kaever | Peter Kaever | 2005-08 | |||||
| applus | 2037 | tcp | APplus Application Server | Alfred Weindl | Marcus Schairer | 2008-06-06 | 2021-07-20 | Unauthorized Use Known on port 2037 | Formerly was P2plus Application Server | ||
| applus | 2037 | udp | APplus Application Server | Alfred Weindl | Marcus Schairer | 2008-06-06 | 2021-07-20 | Unauthorized Use Known on port 2037 | Formerly was P2plus Application Server | ||
| objectmanager | 2038 | tcp | |||||||||
| objectmanager | 2038 | udp | |||||||||
| prizma | 2039 | tcp | Prizma Monitoring Service | Dotan Ofek | Dotan Ofek | 2005-12 | |||||
| prizma | 2039 | udp | Prizma Monitoring Service | Dotan Ofek | Dotan Ofek | 2005-12 | |||||
| isis-bcast | 2043 | tcp | isis-bcast | Ken Chapman | Ken Chapman | ||||||
| isis-bcast | 2043 | udp | isis-bcast | Ken Chapman | Ken Chapman | ||||||
| lot105-ds-upd | 2053 | tcp | Lot105 DSuper Updates | Piers Scannell | Piers Scannell | ||||||
| lot105-ds-upd | 2053 | udp | Lot105 DSuper Updates | Piers Scannell | Piers Scannell | ||||||
| icg-bridge | 2063 | tcp | ICG Bridge Port | ||||||||
| icg-bridge | 2063 | udp | ICG Bridge Port | ||||||||
| gxs-data-port | 2073 | tcp | DataReel Database Socket | Douglas M. Gaer | Douglas M. Gaer | ||||||
| gxs-data-port | 2073 | udp | DataReel Database Socket | Douglas M. Gaer | Douglas M. Gaer | ||||||
| radsec | 2083 | tcp | Secure Radius Service | IESG | IETF Chair | 2005-05 | RFC 6614 | The TCP port 2083 was already previously assigned by IANA for "RadSec", an early implementation of RADIUS/TLS, prior to issuance of this RFC. This early implementation can be configured to be compatible to RADIUS/TLS as specified by the IETF. See RFC 6614, Appendix A for details. | |||
| radsec | 2083 | udp | Secure Radius Service | IESG | IETF Chair | 2005-05 | 2014-07-14 | RFC 7360 | The UDP port 2083 was already previously assigned by IANA for "RadSec", an early implementation of RADIUS/TLS, prior to issuance of this RFC. | ||
| descent3 | 2092 | tcp | Descent 3 | Kevin Bentley | Kevin Bentley | ||||||
| descent3 | 2092 | udp | Descent 3 | Kevin Bentley | Kevin Bentley | ||||||
| nbx-cc | 2093 | tcp | NBX CC | ||||||||
| nbx-cc | 2093 | udp | NBX CC | ||||||||
| zephyr-clt | 2103 | tcp | Zephyr serv-hm connection |