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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| dots-signal | 4646 | tcp | Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel Protocol. The service name is used to construct the SRV service names "_dots-signal._udp" and "_dots-signal._tcp" for discovering DOTS servers used to establish DOTS signal channel. | IESG | IETF Chair | 2020-01-16 | 2021-06-14 | RFC 8973; RFC 9132 | |||
| dots-signal | 4646 | udp | Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel Protocol. The service name is used to construct the SRV service names "_dots-signal._udp" and "_dots-signal._tcp" for discovering DOTS servers used to establish DOTS signal channel. | IESG | IETF Chair | 2020-01-16 | 2021-06-14 | RFC 8973; RFC 9132 | |||
| playsta2-lob | 4659 | tcp | PlayStation2 Lobby Port | Noam Rimon | Noam Rimon | 2004-12 | |||||
| playsta2-lob | 4659 | udp | PlayStation2 Lobby Port | Noam Rimon | Noam Rimon | 2004-12 | |||||
| eportcommdata | 4669 | tcp | E-Port Data Service | Robert Shaffer | Robert Shaffer | 2006-02 | |||||
| eportcommdata | 4669 | udp | E-Port Data Service | Robert Shaffer | Robert Shaffer | 2006-02 | |||||
| mgesupervision | 4679 | tcp | MGE UPS Supervision | ||||||||
| mgesupervision | 4679 | udp | MGE UPS Supervision | ||||||||
| altovacentral | 4689 | tcp | Altova DatabaseCentral | Altova | Altova | 2005-08 | |||||
| altovacentral | 4689 | udp | Altova DatabaseCentral | Altova | Altova | 2005-08 | |||||
| prelude | 4690 | tcp | Prelude IDS message proto | Yoann Vandoorselaere | Yoann Vandoorselaere | 2005-08 | |||||
| prelude | 4690 | udp | Prelude IDS message proto | Yoann Vandoorselaere | Yoann Vandoorselaere | 2005-08 | |||||
| mtn | 4691 | tcp | monotone Netsync Protocol | Thomas Keller | Thomas Keller | 2010-12-22 | |||||
| mtn | 4691 | udp | monotone Netsync Protocol | Thomas Keller | Thomas Keller | 2010-12-22 | |||||
| conspiracy | 4692 | tcp | Conspiracy messaging | Jens Edlund | Jens Edlund | 2005-08 | |||||
| conspiracy | 4692 | udp | Conspiracy messaging | Jens Edlund | Jens Edlund | 2005-08 | |||||
| 4693-4699 | Unassigned | ||||||||||
| 4729 | tcp | Reserved | |||||||||
| gsmtap | 4729 | udp | GSM Interface Tap | Harald Welte | Harald Welte | 2009-01-16 | |||||
| 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 | |||||
| profilemac | 4749 | tcp | Profile for Mac | David Sinclair | David Sinclair | 2006-05 | |||||
| profilemac | 4749 | udp | Profile for Mac | David Sinclair | David Sinclair | 2006-05 | |||||
| vxlan | 4789 | udp | Virtual eXtensible Local Area Network (VXLAN) | Lawrence Kreeger | Lawrence Kreeger | 2013-04-19 | 2014-06-17 | RFC 7348 | |||
| 4789 | tcp | Reserved | |||||||||
| vxlan-gpe | 4790 | udp | Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN) | Lawrence Kreeger | Lawrence Kreeger | 2014-08-26 | |||||
| 4790 | tcp | Reserved | |||||||||
| roce | 4791 | udp | IP Routable RocE | InfiniBand Trade Association (IBTA) | Diego Crupnicoff (IBTA TWG Chair) | 2014-10-17 | |||||
| 4791 | tcp | Reserved | |||||||||
| unified-bus | 4792 | tcp | IP Routable Unified Bus | Huawei | Wei Pan | 2022-07-08 | 2023-04-10 | ||||
| unified-bus | 4792 | udp | IP Routable Unified Bus | Huawei | Wei Pan | 2022-07-08 | 2023-04-10 | ||||
| 4793 | tcp | Reserved | |||||||||
| uet | 4793 | udp | Ultra Ethernet Transport | Ultra Ethernet Consortium | Vivek Kashyap | 2025-06-16 | |||||
| 4794 | tcp | Reserved | |||||||||
| veroce | 4794 | udp | veRoCE Transport Protocol | ByteDance | Dai Huichen | 2026-03-06 | |||||
| 4795-4799 | Unassigned | ||||||||||
| varadero-2 | 4839 | tcp | Varadero-2 | Carlos Arteaga | Carlos Arteaga | ||||||
| varadero-2 | 4839 | udp | Varadero-2 | Carlos Arteaga | Carlos Arteaga | ||||||
| appserv-https | 4849 | tcp | App Server - Admin HTTPS | Sreeram Duvvuru | Sreeram Duvvuru | 2002-04 | |||||
| appserv-https | 4849 | udp | App Server - Admin HTTPS | Sreeram Duvvuru | Sreeram Duvvuru | 2002-04 | |||||
| phrelaydbg | 4869 | tcp | Photon Relay Debug | Michael Hunter | Michael Hunter | ||||||
| phrelaydbg | 4869 | udp | Photon Relay Debug | Michael Hunter | Michael Hunter | ||||||
| wsdl-event | 4879 | tcp | WSDL Event Receiver | Charles F Steele | Charles F Steele | 2011-02-15 | |||||
| 4879 | udp | Reserved | |||||||||
| xcap-control | 4889 | tcp | xcap code analysis portal cluster control and administration | 88solutions Corporation | Manfred Koethe | 2018-06-06 | |||||
| 4889 | udp | Reserved | |||||||||
| 4890-4893 | Unassigned | ||||||||||
| lyskom | 4894 | tcp | LysKOM Protocol A | Per Cederqvist | Per Cederqvist | ||||||
| lyskom | 4894 | udp | LysKOM Protocol A | Per Cederqvist | Per Cederqvist | ||||||
| 4895-4898 | Unassigned | ||||||||||
| radmin-port | 4899 | tcp | RAdmin Port | Dmitri Znosko | Dmitri Znosko | 2003-03 | |||||
| radmin-port | 4899 | udp | RAdmin Port | Dmitri Znosko | Dmitri Znosko | 2003-03 | |||||
| hfcs | 4900 | tcp | HFSQL Client/Server Database Engine | PC SOFT | Jerome AERTS | 2006-03-02 | 2014-02-02 | ||||
| hfcs | 4900 | udp | HFSQL Client/Server Database Engine | PC SOFT | Jerome AERTS | 2006-03-02 | 2014-02-02 | ||||
| flr-agent | 4901 | tcp | FileLocator Remote Search Agent IANA assigned this well-formed service name as a replacement for "flr_agent". |
David Vest | David Vest | 2008-11-19 | |||||
| flr_agent | 4901 | tcp | FileLocator Remote Search Agent | David Vest | David Vest | 2008-11-19 | This entry is an alias to "flr-agent". This entry is now historic, not usable for use with many common service discovery mechanisms. | ||||
| 4901 | udp | Reserved | |||||||||
| magiccontrol | 4902 | tcp | magicCONROL RF and Data Interface | Andreas Spalenski | Andreas Spalenski | 2008-11-24 | |||||
| 4902 | udp | Reserved | |||||||||
| 4903-4911 | Unassigned | ||||||||||
| lutap | 4912 | tcp | Technicolor LUT Access Protocol | Markus Loeffler | Markus Loeffler | 2009-02-17 | |||||
| 4912 | udp | Reserved | |||||||||
| lutcp | 4913 | tcp | LUTher Control Protocol | Markus Loeffler | Markus Loeffler | 2007-07-03 | |||||
| bones | 4914 | tcp | Bones Remote Control | Andreas Foedrowitz | Andreas Foedrowitz | 2008-06-18 | |||||
| bones | 4914 | udp | Bones Remote Control | Andreas Foedrowitz | Andreas Foedrowitz | 2008-06-18 | |||||
| frcs | 4915 | tcp | Fibics Remote Control Service | Ken Lagarec | Ken Lagarec | 2009-04-17 | |||||
| 4915 | udp | Reserved | |||||||||
| 4916-4929 | Unassigned | ||||||||||
| 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 | ||||||||||
| eq-office-4940 | 4940 | tcp | Equitrac Office | ||||||||
| eq-office-4940 | 4940 | udp | Equitrac Office | ||||||||
| eq-office-4941 | 4941 | tcp | Equitrac Office | ||||||||
| eq-office-4941 | 4941 | udp | Equitrac Office | ||||||||
| eq-office-4942 | 4942 | tcp | Equitrac Office | Tom Haapanen | Tom Haapanen | 2007-07-11 | |||||
| eq-office-4942 | 4942 | udp | Equitrac Office | Tom Haapanen | Tom Haapanen | 2007-07-11 | |||||
| 4943-4948 | Unassigned | ||||||||||
| munin | 4949 | tcp | Munin Graphing Framework | Jimmy Olsen | Jimmy Olsen | 2010-12-24 | |||||
| munin | 4949 | udp | Munin Graphing Framework | Jimmy Olsen | Jimmy Olsen | 2010-12-24 | |||||
| sybasesrvmon | 4950 | tcp | Sybase Server Monitor | Chris Irie | Chris Irie | 2008-03-26 | |||||
| sybasesrvmon | 4950 | udp | Sybase Server Monitor | Chris Irie | Chris Irie | 2008-03-26 | |||||
| pwgwims | 4951 | tcp | PWG WIMS | Ira McDonald | Ira McDonald | 2005-12 | |||||
| pwgwims | 4951 | udp | PWG WIMS | Ira McDonald | Ira McDonald | 2005-12 | |||||
| sagxtsds | 4952 | tcp | SAG Directory Server | Michael Chirila | Michael Chirila | 2006-01 | |||||
| sagxtsds | 4952 | udp | SAG Directory Server | Michael Chirila | Michael Chirila | 2006-01 | |||||
| dbsyncarbiter | 4953 | tcp | Synchronization Arbiter | Dave Neudoerffer | Dave Neudoerffer | 2009-11-18 | |||||
| 4953 | udp | Reserved | |||||||||
| 4954-4968 | Unassigned | Known UNAUTHORIZED USE: port 4967 | |||||||||
| ccss-qmm | 4969 | tcp | CCSS QMessageMonitor | ||||||||
| ccss-qmm | 4969 | udp | CCSS QMessageMonitor | ||||||||
| ccss-qsm | 4970 | tcp | CCSS QSystemMonitor | David Young | David Young | 2006-01 | |||||
| ccss-qsm | 4970 | udp | CCSS QSystemMonitor | David Young | David Young | 2006-01 | |||||
| burp | 4971 | tcp | BackUp and Restore Program | Marat Khalili | Marat Khalili | 2017-08-23 | |||||
| 4971 | udp | Reserved |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| 88solutions Corporation | koethe&88solutions.com | 2018-06-06 | |
| Altova | has&altova.com | 2005-08 | |
| Andreas Foedrowitz | andreas.foedrowitz&thomson.net | 2008-06-18 | |
| Andreas Spalenski | andreas.spalenski&trsystems.de | 2008-11-24 | |
| ByteDance | daihuichen&bytedance.com | 2026-03-06 | |
| Carlos Arteaga | carteaga&abacoinc.com | ||
| Charles F Steele | charles_steele&agilent.com | 2011-02-15 | |
| Chris Irie | irie&sybase.com | 2008-03-26 | |
| Cisco Systems | eckert&cisco.com | 2014-06-06 | |
| Dai Huichen | daihuichen&bytedance.com | 2026-03-06 | |
| Dave Neudoerffer | dave.neudoerffer&sybase.com | 2009-11-18 | |
| David Sinclair | dev&profilemac.com | 2006-05 | |
| David Vest | dave&mythicsoft.com | 2008-11-19 | |
| David Young | david.young&ccsseurope.co.uk | 2006-01 | |
| Diego Crupnicoff (IBTA TWG Chair) | diego&mellanox.com | 2014-10-17 | |
| Dmitri Znosko | support&radmin.com | 2003-03 | |
| FMSG AI PTY LTD | mark&fmsg.ai | 2026-10-15 | |
| Harald Welte | laforge&gnumonks.org | 2009-01-16 | |
| Huawei | tarzan.pan&huawei.com | 2023-04-10 | |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| InfiniBand Trade Association (IBTA) | administration&infinibandta.org | 2014-10-17 | |
| Ira McDonald | imcdonald&sharplabs.com | 2005-12 | |
| Jens Edlund | edlund&speech.kth.se | 2005-08 | |
| Jerome AERTS | PC SOFT | jae&pcsoft.fr | 2014-02-02 |
| Jerry Whitaker | jwhitaker&atsc.org | 2008-10-27 | |
| Jimmy Olsen | jo&redpill-linpro.com | 2010-12-24 | |
| Ken Lagarec | klagarec&fibics.com | 2009-04-17 | |
| Lawrence Kreeger | kreeger&cisco.com | 2013-04-19 | |
| Manfred Koethe | koethe&88solutions.com | 2018-06-06 | |
| Marat Khalili | qm2k&yandex.ru | 2017-08-23 | |
| Mark Mennell | mark&fmsg.ai | 2026-10-15 | |
| Markus Loeffler | markus.loeffler&thomson.net | 2009-02-17 | |
| Michael Chirila | Michael.Chirila&softwareag.com | 2006-01 | |
| Michael Hunter | mphunter&qnx.com | ||
| Nevil Brownlee | n.brownlee&auckland.ac.nz | 2006-10 | |
| Noam Rimon | noam.rimon&playstation.sony.com | 2004-12 | |
| PC SOFT | jae&pcsoft.fr | 2014-02-02 | |
| Per Cederqvist | ceder&lysator.liu.se | ||
| Robert Shaffer | bob.shaffer&micmod.com | 2006-02 | |
| Sreeram Duvvuru | sduv&sfbay.sun.com | 2002-04 | |
| Thomas Keller | me&thomaskeller.biz | 2010-12-22 | |
| Toerless Eckert | Cisco Systems | eckert&cisco.com | 2014-06-06 |
| Tom Haapanen | tomh&equitrac.com | 2007-07-11 | |
| Ultra Ethernet Consortium | vivek.kashyap&intel.com | 2025-06-16 | |
| Vivek Kashyap | vivek.kashyap&intel.com | 2025-06-16 | |
| Wei Pan | Huawei | tarzan.pan&huawei.com | 2023-04-10 |
| Yoann Vandoorselaere | yoann&prelude-ids.org | 2005-08 |