Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-11-10
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| discard | 9 | dccp | Discard | Eddie Kohler | Eddie Kohler | RFC 4340 | 1145656131 | ||||
| spmp | 656 | tcp | SPMP | Jakob Kaivo | Jakob Kaivo | ||||||
| spmp | 656 | udp | SPMP | Jakob Kaivo | Jakob Kaivo | ||||||
| owamp-control | 861 | tcp | OWAMP-Control | IESG | IETF Chair | RFC 4656 | |||||
| dec-mbadmin-h | 1656 | tcp | dec-mbadmin-h | Nick Shipman | Nick Shipman | ||||||
| dec-mbadmin-h | 1656 | udp | dec-mbadmin-h | Nick Shipman | Nick Shipman | ||||||
| kana | 2656 | tcp | Kana | Colin Goldstein | Colin Goldstein | ||||||
| kana | 2656 | udp | Kana | Colin Goldstein | Colin Goldstein | ||||||
| turn | 3478 | tcp | TURN over TCP | 2019-08-02 | RFC 8656 | ||||||
| turn | 3478 | udp | TURN over UDP | 2019-08-02 | RFC 8656 | ||||||
| abatjss | 3656 | tcp | ActiveBatch Job Scheduler | Ben Rosenberg | Ben Rosenberg | 2003-01 | |||||
| abatjss | 3656 | udp | ActiveBatch Job Scheduler | Ben Rosenberg | Ben Rosenberg | 2003-01 | |||||
| mupdate | 3905 | tcp | Mailbox Update (MUPDATE) protocol | RFC 3656 | |||||||
| mupdate | 3905 | udp | Mailbox Update (MUPDATE) protocol | RFC 3656 | |||||||
| turns | 5349 | tcp | TURN over TLS | 2019-08-02 | RFC 8656 | ||||||
| turns | 5349 | udp | TURN over DTLS | IESG | IETF Chair | 2019-08-02 | RFC 7350 | This service name was initially created by RFC 8656. | |||
| 6559-6565 | Unassigned | ||||||||||
| sane-port | 6566 | tcp | SANE Control Port | Henning Meier-Geinitz | Henning Meier-Geinitz | 2002-10 | |||||
| sane-port | 6566 | udp | SANE Control Port | Henning Meier-Geinitz | Henning Meier-Geinitz | 2002-10 | |||||
| 6567 | Reserved | 2007-01 | 2011-08-26 | This entry has been removed on 2011-08-26. | |||||||
| canit-store | 6568 | tcp | CanIt Storage Manager IANA assigned this well-formed service name as a replacement for "canit_store". |
Dianne Skoll | Dianne Skoll | 2009-04-22 | 2017-05-25 | ||||
| canit_store | 6568 | tcp | CanIt Storage Manager | Dianne Skoll | Dianne Skoll | 2009-04-22 | 2017-05-25 | This entry is an alias to "canit-store". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||
| rp-reputation | 6568 | udp | Roaring Penguin IP Address Reputation Collection | Dianne Skoll | Dianne Skoll | 2010-02-05 | 2017-05-25 | ||||
| 6569-6578 | Unassigned | ||||||||||
| emgmsg | 6656 | tcp | Emergency Message Control Service | Gerry Gorman | Gerry Gorman | 2010-12-06 | |||||
| 6656 | udp | Reserved | |||||||||
| snip-slave | 33656 | tcp | SNIP Slave | Dr. Chris Tucker | Dr. Chris Tucker | 2005-08 | |||||
| snip-slave | 33656 | udp | SNIP Slave | Dr. Chris Tucker | Dr. Chris Tucker | 2005-08 |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Ben Rosenberg | brosenberg&advsyscon.com | 2003-01 | |
| Colin Goldstein | Colin&kana.com | ||
| Dianne Skoll | dfs&roaringpenguin.com | 2017-05-25 | |
| Dr. Chris Tucker | chris.tucker&ioltd.co.uk | 2005-08 | |
| Eddie Kohler | IETF dccp WG | kohler&cs.ucla.edu | |
| Gerry Gorman | gerry.gorman&emclock.com | 2010-12-06 | |
| Henning Meier-Geinitz | henning&meier-geinitz.de | 2002-10 | |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| Jakob Kaivo | jkaivo&nodomainname.net | ||
| Nick Shipman | Nick.Shipman&mrmog.reo.dec.com |