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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4733 | udp | Reserved | |||||||||
| 4734-4736 | Unassigned | ||||||||||
| ipdr-sp | 4737 | tcp | IPDR/SP | Ken Sarno | Ken Sarno | 2005-08 | |||||
| ipdr-sp | 4737 | udp | IPDR/SP | Ken Sarno | Ken Sarno | 2005-08 | |||||
| solera-lpn | 4738 | tcp | SoleraTec Locator | Mark Armstrong | Mark Armstrong | 2005-12 | |||||
| solera-lpn | 4738 | udp | SoleraTec Locator | Mark Armstrong | Mark Armstrong | 2005-12 | |||||
| ipfix | 4739 | tcp | IP Flow Info Export | Nevil Brownlee | Nevil Brownlee | 2005-08 | |||||
| ipfix | 4739 | udp | IP Flow Info Export | Nevil Brownlee | Nevil Brownlee | 2005-08 | |||||
| ipfix | 4739 | sctp | IP Flow Info Export | Nevil Brownlee | Nevil Brownlee | 2006-01 | |||||
| openhpid | 4743 | tcp | openhpi HPI service | Thomas Kanngieser | Thomas Kanngieser | 2006-01 | |||||
| openhpid | 4743 | udp | openhpi HPI service | Thomas Kanngieser | Thomas Kanngieser | 2006-01 | |||||
| simon | 4753 | tcp | Simple Invocation of Methods Over Network (SIMON) | Alexander Christian | Alexander Christian | 2012-04-19 | |||||
| simon-disc | 4753 | udp | Simple Invocation of Methods Over Network (SIMON) Discovery | Alexander Christian | Alexander Christian | 2012-04-19 | |||||
| 4757-4773 | Unassigned | ||||||||||
| 4775-4783 | Unassigned | ||||||||||
| vxlan | 4789 | udp | Virtual eXtensible Local Area Network (VXLAN) | Lawrence Kreeger | Lawrence Kreeger | 2013-04-19 | 2014-06-17 | RFC 7348 | |||
| 4793 | tcp | Reserved | |||||||||
| uet | 4793 | udp | Ultra Ethernet Transport | Ultra Ethernet Consortium | Vivek Kashyap | 2025-06-16 | |||||
| notateit | 4803 | tcp | Notateit Messaging | ||||||||
| notateit-disc | 4803 | udp | Notateit Messaging Discovery | Ean Black | Ean Black | 2009-04-08 | |||||
| 4828-4836 | Unassigned | ||||||||||
| varadero-0 | 4837 | tcp | Varadero-0 | ||||||||
| varadero-0 | 4837 | udp | Varadero-0 | ||||||||
| varadero-1 | 4838 | tcp | Varadero-1 | ||||||||
| varadero-1 | 4838 | udp | Varadero-1 | ||||||||
| varadero-2 | 4839 | tcp | Varadero-2 | Carlos Arteaga | Carlos Arteaga | ||||||
| varadero-2 | 4839 | udp | Varadero-2 | Carlos Arteaga | Carlos Arteaga | ||||||
| opcua-tls | 4843 | tcp | OPC UA TCP Protocol over TLS/SSL | OPC Foundation | Randy Armstrong | 2006-09 | 2017-05-23 | ||||
| opcua-tls | 4843 | udp | OPC UA TCP Protocol over TLS/SSL | OPC Foundation | Randy Armstrong | 2006-09 | |||||
| wmlserver | 4883 | tcp | Meier-Phelps License Server | William Phelps | William Phelps | 2010-03-22 | |||||
| 4883 | udp | Reserved | |||||||||
| 4890-4893 | Unassigned | ||||||||||
| 4903-4911 | Unassigned | ||||||||||
| lutcp | 4913 | tcp | LUTher Control Protocol | Markus Loeffler | Markus Loeffler | 2007-07-03 | |||||
| fmsg | 4930 | tcp | Host-to-host messaging | FMSG AI PTY LTD | Mark Mennell | 2026-10-15 | |||||
| 4930 | udp | Reserved | |||||||||
| 4931-4935 | Unassigned | ||||||||||
| an-signaling | 4936 | udp | Signal protocol port for autonomic networking | Cisco Systems | Toerless Eckert | 2014-06-06 | |||||
| 4936 | tcp | Reserved | |||||||||
| 4937 | tcp | Reserved | |||||||||
| atsc-mh-ssc | 4937 | udp | ATSC-M/H Service Signaling Channel | Jerry Whitaker | Jerry Whitaker | 2008-10-27 | |||||
| 4938-4939 | Unassigned | ||||||||||
| 4943-4948 | Unassigned | ||||||||||
| dbsyncarbiter | 4953 | tcp | Synchronization Arbiter | Dave Neudoerffer | Dave Neudoerffer | 2009-11-18 | |||||
| 4953 | udp | Reserved | |||||||||
| 4983 | Unassigned | 2005-12-22 | |||||||||
| fmpro-internal | 5003 | tcp | FileMaker, Inc. - Proprietary transport | Clay Maeckel | Clay Maeckel | ||||||
| fmpro-internal | 5003 | udp | FileMaker, Inc. - Proprietary name binding | Clay Maeckel | Clay Maeckel | ||||||
| avt-profile-1 | 5004 | tcp | RTP media data | RFC 3551; RFC 4571 | |||||||
| avt-profile-1 | 5004 | udp | RTP media data | RFC 3551 | |||||||
| avt-profile-1 | 5004 | dccp | RTP media data | RFC 3551; RFC 5762 | |||||||
| avt-profile-2 | 5005 | tcp | RTP control protocol | RFC 3551; RFC 4571 | |||||||
| avt-profile-2 | 5005 | udp | RTP control protocol | RFC 3551 | |||||||
| avt-profile-2 | 5005 | dccp | RTP control protocol | RFC 3551; RFC 5762 | |||||||
| fmpro-v6 | 5013 | tcp | FileMaker, Inc. - Proprietary transport | Alex Chen | Alex Chen | 2007-08-01 | |||||
| fmpro-v6 | 5013 | udp | FileMaker, Inc. - Proprietary transport | Alex Chen | Alex Chen | 2007-08-01 | |||||
| htuilsrv | 5023 | tcp | Htuil Server for PLD2 | Dennis Reinhardt | Dennis Reinhardt | ||||||
| htuilsrv | 5023 | udp | Htuil Server for PLD2 | Dennis Reinhardt | Dennis Reinhardt | ||||||
| 5030 | tcp | Reserved | 2006-12 | 2022-01-10 | Historic usage was surfpass. De-Assigned on 2022-01-10 | ||||||
| 5030 | udp | Reserved | 2006-12 | 2022-01-10 | Historic usage was surfpass. De-Assigned on 2022-01-10 | ||||||
| 5031 | tcp | Reserved | |||||||||
| dmp | 5031 | udp | Direct Message Protocol | Gjermund Wallenius | Gjermund Wallenius | 2009-09-30 | |||||
| signacert-agent | 5032 | tcp | SignaCert Enterprise Trust Server Agent | Harris, Corporation | Daniel R Somerfield | 2011-08-05 | |||||
| 5032 | udp | Reserved | |||||||||
| jtnetd-server | 5033 | tcp | Janstor Secure Data | Janstor Technology | Anthony Johnson | 2015-06-08 | |||||
| 5033 | udp | Reserved | |||||||||
| jtnetd-status | 5034 | tcp | Janstor Status | Janstor Technology | Anthony Johnson | 2015-06-08 | |||||
| 5034 | udp | Reserved | |||||||||
| 5035-5041 | Unassigned | ||||||||||
| swxadmin | 5043 | tcp | ShopWorX Administration | Don W. Fitzpatrick | Don W. Fitzpatrick | 2005-08 | |||||
| swxadmin | 5043 | udp | ShopWorX Administration | Don W. Fitzpatrick | Don W. Fitzpatrick | 2005-08 | |||||
| rlm | 5053 | tcp | RLM License Server | Matt Christiano | Matt Christiano | 2008-07-28 | |||||
| rlm-disc | 5053 | udp | RLM Discovery Server | Reprise Software, Inc. | Matt Christiano | 2012-11-06 | |||||
| sip | 5060 | tcp | SIP | 2014-04-09 | RFC 3263 | ||||||
| sip | 5060 | udp | SIP | 2014-04-09 | RFC 3263 | ||||||
| sips | 5061 | tcp | SIP-TLS | 2014-04-09 | RFC 3263 | ||||||
| sips | 5061 | udp | SIP-TLS | 2014-04-09 | RFC 3263 | ||||||
| csrpc | 5063 | tcp | centrify secure RPC | Paul Moore | Paul Moore | 2009-10-28 | |||||
| 5063 | udp | Reserved | |||||||||
| tag-pm | 5073 | tcp | Advantage Group Port Mgr | James Goddard | James Goddard | 2005-08 | |||||
| tag-pm | 5073 | udp | Advantage Group Port Mgr | James Goddard | James Goddard | 2005-08 | |||||
| qfp | 5083 | tcp | Qpur File Protocol | Joachim Kluemper | Joachim Kluemper | 2008-03-19 | |||||
| qfp | 5083 | udp | Qpur File Protocol | Joachim Kluemper | Joachim Kluemper | 2008-03-19 | |||||
| sentinel-lm | 5093 | tcp | Sentinel LM | Derick Snyder | Derick Snyder | ||||||
| sentinel-lm | 5093 | udp | Sentinel LM | Derick Snyder | Derick Snyder | ||||||
| actifio-c2c | 5103 | tcp | Actifio C2C | Ravi Kollipara | Ravi Kollipara | 2010-06-18 | |||||
| 5103 | udp | Reserved | |||||||||
| 5113 | Unassigned | 2010-11-09 | |||||||||
| 5121-5132 | Unassigned | ||||||||||
| nbt-pc | 5133 | tcp | Policy Commander | Emily Harris | Emily Harris | 2004-11 | |||||
| nbt-pc | 5133 | udp | Policy Commander | Emily Harris | Emily Harris | 2004-11 | |||||
| ppactivation | 5134 | tcp | PP ActivationServer | Ian Bradley | Ian Bradley | 2009-10-14 | |||||
| 5134 | udp | Reserved | |||||||||
| erp-scale | 5135 | tcp | ERP-Scale | Ian Bradley | Ian Bradley | 2009-10-14 | Defined TXT keys: RFC=<RFC destination and status> Device=<Scale device and status> |
||||
| 5135 | udp | Reserved | |||||||||
| 5136 | tcp | Reserved | |||||||||
| minotaur-sa | 5136 | udp | Minotaur SA | Kenneth Flynn | Kenneth Flynn | 2009-10-14 | |||||
| ctsd | 5137 | tcp | MyCTS server port | Jilles Oldenbeuving | Jilles Oldenbeuving | 2002-06 | |||||
| ctsd | 5137 | udp | MyCTS server port | Jilles Oldenbeuving | Jilles Oldenbeuving | 2002-06 | |||||
| 5138-5144 | Unassigned | ||||||||||
| 5153 | tcp | Reserved | 2009-07-01 | 2018-04-19 | Historic usage was toruxserver. De-Assigned on 2018-04-19 |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Alex Chen | alex_chen&filemaker.com | 2009-11-25 | |
| Alexander Christian | alexander.christian&root1.de | 2012-04-19 | |
| Anthony Johnson | Janstor Technology | jtadmin&janstor.com | 2015-06-08 |
| Carlos Arteaga | carteaga&abacoinc.com | ||
| Cisco Systems | eckert&cisco.com | 2014-06-06 | |
| Clay Maeckel | clay&claris.com | 2023-09-12 | |
| Daniel R Somerfield | dsomerfi&harris.com | 2011-08-05 | |
| Dave Neudoerffer | dave.neudoerffer&sybase.com | 2009-11-18 | |
| Dennis Reinhardt | DennisR&dair.com | ||
| Derick Snyder | dsnyder&rainbow.com | ||
| Don W. Fitzpatrick | dwf&internetworxsystems.com | 2005-08 | |
| Ean Black | eanb&bladesoftware.co.uk | 2009-04-08 | |
| Emily Harris | eharris&newboundary.com | 2004-11 | |
| FMSG AI PTY LTD | mark&fmsg.ai | 2026-10-15 | |
| Gjermund Wallenius | gwallenius&ndlocis.mil.no | 2009-09-30 | |
| Harris, Corporation | dsomerfi&harris.com | 2011-08-05 | |
| Ian Bradley | ian.bradley&pocketprograms.com
development&pocketprograms.com |
2009-10-14 | |
| James Goddard | jamesg&taglim.com | 2005-08 | |
| Janstor Technology | jtadmin&janstor.com | 2015-06-08 | |
| Jerry Whitaker | jwhitaker&atsc.org | 2008-10-27 | |
| Jilles Oldenbeuving | ojilles&gmail.com | 2020-11-18 | |
| Joachim Kluemper | ports&raikosoft.com | 2008-03-19 | |
| Ken Sarno | kensarno&insightbb.com | 2005-08 | |
| Kenneth Flynn | flynnk&darkcornersoftware.com | 2009-10-14 | |
| Lawrence Kreeger | kreeger&cisco.com | 2013-04-19 | |
| Mark Armstrong | Mark.Armstrong&soleratec.com | 2005-12 | |
| Mark Mennell | mark&fmsg.ai | 2026-10-15 | |
| Markus Loeffler | markus.loeffler&thomson.net | 2009-02-17 | |
| Matt Christiano | matt&reprisesoftware.com | 2008-07-28 | |
| Matt Christiano | Reprise Software, Inc. | matt&reprisesoftware.com | 2012-11-06 |
| Nevil Brownlee | n.brownlee&auckland.ac.nz | 2006-10 | |
| OPC Foundation | tcb&opcfoundation.org | 2017-05-23 | |
| Paul Moore | paul.moore¢rify.com | 2009-10-28 | |
| Randy Armstrong | tcb&opcfoundation.org | 2017-05-23 | |
| Ravi Kollipara | ravi.kollipara&actifio.com | 2010-06-18 | |
| Reprise Software, Inc. | matt&reprisesoftware.com | 2012-11-06 | |
| Thomas Kanngieser | thomas.kanngieser&arcor.de | 2006-01 | |
| Toerless Eckert | Cisco Systems | eckert&cisco.com | 2014-06-06 |
| Ultra Ethernet Consortium | vivek.kashyap&intel.com | 2025-06-16 | |
| Vivek Kashyap | vivek.kashyap&intel.com | 2025-06-16 | |
| William Phelps | william&meier-phelps.com | 2010-03-22 |