Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-22
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| elanlm | 4346 | tcp | ELAN LM | Paul Ballew | Paul Ballew | ||||||
| elanlm | 4346 | udp | ELAN LM | Paul Ballew | Paul Ballew | ||||||
| qsnet-assist | 4356 | tcp | QSNet Assistant | ||||||||
| qsnet-assist | 4356 | udp | QSNet Assistant | ||||||||
| matrix-vnet | 4360 | tcp | Matrix VNet Communication Protocol IANA assigned this well-formed service name as a replacement for "matrix_vnet". |
Rehan Mahmood | Rehan Mahmood | 2009-03-18 | |||||
| matrix_vnet | 4360 | tcp | Matrix VNet Communication Protocol | Rehan Mahmood | Rehan Mahmood | 2009-03-18 | This entry is an alias to "matrix-vnet". This entry is now historic, not usable for use with many common service discovery mechanisms. | ||||
| 4360 | udp | Reserved | |||||||||
| 4361 | tcp | Reserved | |||||||||
| nacnl | 4361 | udp | NavCom Discovery and Control Port | Yilei Jia | Yilei Jia | 2009-03-18 | |||||
| 4362 | tcp | Reserved | |||||||||
| afore-vdp-disc | 4362 | udp | AFORE vNode Discovery protocol | Michael Richardson | Michael Richardson | 2011-02-08 | |||||
| 4363-4365 | Unassigned | ||||||||||
| shadowstream | 4366 | udp | ShadowStream System | StorageCraft Technology Corporation | David McConkie | 2014-12-17 | |||||
| 4366 | tcp | Reserved | |||||||||
| 4367 | Unassigned | ||||||||||
| wxbrief | 4368 | tcp | WeatherBrief Direct | Kim Alan Waggoner | Kim Alan Waggoner | 2006-11 | |||||
| wxbrief | 4368 | udp | WeatherBrief Direct | Kim Alan Waggoner | Kim Alan Waggoner | 2006-11 | |||||
| epmd | 4369 | tcp | Erlang Port Mapper Daemon | Erlang/OTP support | Erlang/OTP support | ||||||
| epmd | 4369 | udp | Erlang Port Mapper Daemon | Erlang/OTP support | Erlang/OTP support | ||||||
| bip | 4376 | tcp | BioAPI Interworking | Jean-Paul Lemaire | Jean-Paul Lemaire | 2007-07-05 | |||||
| bip | 4376 | udp | BioAPI Interworking | Jean-Paul Lemaire | Jean-Paul Lemaire | 2007-07-05 | |||||
| fly | 4396 | tcp | Fly Object Space | Nigel Warren | Nigel Warren | 2009-02-12 | |||||
| 4396 | udp | Reserved | |||||||||
| ds-slp | 4406 | tcp | ASIGRA Televaulting DS-Sleeper Service | Andrei Litvinn | Andrei Litvinn | 2005-01 | |||||
| ds-slp | 4406 | udp | ASIGRA Televaulting DS-Sleeper Service | Andrei Litvinn | Andrei Litvinn | 2005-01 | |||||
| newmood-player | 4416 | tcp | Newmood Media Player | Creation Newmood Inc. | Bruno Frechette | 2015-11-18 | 2026-09-30 | ||||
| newmood-player | 4416 | udp | Newmood Media Player discovery | Creation Newmood Inc. | Bruno Frechette | 2015-11-18 | 2026-09-30 | ||||
| netrockey6 | 4425 | tcp | NetROCKEY6 SMART Plus Service | Feitian Technologies | Feitian Technologies | 2010-09-15 | |||||
| netrockey6 | 4425 | udp | NetROCKEY6 SMART Plus Service | Feitian Technologies | Feitian Technologies | 2010-09-15 | |||||
| beacon-port-2 | 4426 | tcp | SMARTS Beacon Port | Eyal Yardeni | Eyal Yardeni | 2003-11 | |||||
| beacon-port-2 | 4426 | udp | SMARTS Beacon Port | Eyal Yardeni | Eyal Yardeni | 2003-11 | |||||
| n1-fwp | 4446 | tcp | N1-FWP | ||||||||
| n1-fwp | 4446 | udp | N1-FWP | ||||||||
| prchat-server | 4456 | tcp | PR Chat Server | ||||||||
| prchat-server | 4456 | udp | PR Chat Server | ||||||||
| ntske | 4460 | tcp | Network Time Security Key Establishment | IESG | IETF Chair | 2020-04-07 | RFC 8915 | ||||
| 4460 | udp | Reserved | |||||||||
| 4461-4479 | Unassigned | ||||||||||
| icms | 4486 | tcp | Integrated Client Message Service | Resource Allocation Team | Resource Allocation Team | 2010-09-27 | |||||
| icms | 4486 | udp | Integrated Client Message Service | Resource Allocation Team | Resource Allocation Team | 2010-09-27 | |||||
| ipsec-nat-t | 4500 | udp | IPsec NAT-Traversal | 2017-07-07 | RFC 3948; RFC 7296 | ||||||
| ehs-ssl | 4536 | tcp | Event Heap Server SSL | Brad Johanson | Brad Johanson | 2005-08 | |||||
| ehs-ssl | 4536 | udp | Event Heap Server SSL | Brad Johanson | Brad Johanson | 2005-08 | |||||
| sf-lm | 4546 | tcp | SF License Manager (Sentinel) | Thomas Koell | Thomas Koell | ||||||
| sf-lm | 4546 | udp | SF License Manager (Sentinel) | Thomas Koell | Thomas Koell | ||||||
| ieee-mih | 4551 | tcp | MIH Services | RFC 5677 | |||||||
| ieee-mih | 4551 | udp | MIH Services | RFC 5677 | |||||||
| dtn-bundle | 4556 | tcp | DTN Bundle TCP CL Protocol | IESG | IETF Chair | 2021-02-22 | RFC 9174 | ||||
| dtn-bundle | 4556 | udp | DTN Bundle UDP CL Protocol | 2006-11 | 2014-02-21 | RFC 7122 | |||||
| dtn-bundle | 4556 | dccp | DTN Bundle DCCP CL Protocol | 2013-11-12 | 2014-02-21 | RFC 7122 | 1685351985 | ||||
| 4560-4562 | Unassigned | ||||||||||
| amahi-anywhere | 4563 | tcp | Amahi Anywhere | Amahi | Carlos Puchol | 2014-02-27 | |||||
| 4563 | udp | Reserved | |||||||||
| 4564-4565 | Unassigned | ||||||||||
| kwtc | 4566 | tcp | Kids Watch Time Control Service | Larry Zarou | Larry Zarou | 2006-10 | |||||
| kwtc | 4566 | udp | Kids Watch Time Control Service | Larry Zarou | Larry Zarou | 2006-10 | |||||
| tram | 4567 | tcp | TRAM | Joe Wesley | Joe Wesley | ||||||
| tram | 4567 | udp | TRAM | Joe Wesley | Joe Wesley | ||||||
| bmc-reporting | 4568 | tcp | BMC Reporting | Portnoy Boxman | Portnoy Boxman | ||||||
| bmc-reporting | 4568 | udp | BMC Reporting | Portnoy Boxman | Portnoy Boxman | ||||||
| iax | 4569 | tcp | Inter-Asterisk eXchange | Benjamin Kowarsch | Benjamin Kowarsch | RFC 5456 | Defined TXT keys: auth plaintext | md5 | rsakeys userid alphanumeric, additionally '_', '+', '-' secret any printable ASCII characters domain any DNS domain name or IP address extension alphanumeric, additionally '*', '#', '_', '+', '-' context alphanumeric, additionally '_', '+', '-' trunk yes | no | 0 | 1 welcome alphanumeric, additionally '*', '#', '_', '+', '-' voicemail alphanumeric, additionally '*', '#', '_', '+', '-' reception alphanumeric, additionally '*', '#', '_', '+', '-' echotest alphanumeric, additionally '*', '#', '_', '+', '-' ivrtest alphanumeric, additionally '*', '#', '_', '+', '-' All of these TXT record keys are optional, they may be omitted. Further keys may be added in the future. |
||||
| iax | 4569 | udp | Inter-Asterisk eXchange | Benjamin Kowarsch | Benjamin Kowarsch | RFC 5456 | Defined TXT keys: auth plaintext | md5 | rsakeys userid alphanumeric, additionally '_', '+', '-' secret any printable ASCII characters domain any DNS domain name or IP address extension alphanumeric, additionally '*', '#', '_', '+', '-' context alphanumeric, additionally '_', '+', '-' trunk yes | no | 0 | 1 welcome alphanumeric, additionally '*', '#', '_', '+', '-' voicemail alphanumeric, additionally '*', '#', '_', '+', '-' reception alphanumeric, additionally '*', '#', '_', '+', '-' echotest alphanumeric, additionally '*', '#', '_', '+', '-' ivrtest alphanumeric, additionally '*', '#', '_', '+', '-' All of these TXT record keys are optional, they may be omitted. Further keys may be added in the future. |
||||
| rid | 4590 | tcp | RID over HTTP/TLS | IESG | IETF Chair | RFC 6546 | |||||
| ias-neighbor | 4596 | tcp | IAS-Neighbor (ANRI-ANRI) | David Ott | David Ott | 2007-07-31 | |||||
| ias-neighbor | 4596 | udp | IAS-Neighbor (ANRI-ANRI) | David Ott | David Ott | 2007-07-31 | |||||
| a16-an-an | 4598 | tcp | A16 (AN-AN) | David Ott | David Ott | 2005-12 | |||||
| a16-an-an | 4598 | udp | A16 (AN-AN) | David Ott | David Ott | 2005-12 | |||||
| piranha1 | 4600 | tcp | Piranha1 | ||||||||
| piranha1 | 4600 | udp | Piranha1 | ||||||||
| piranha2 | 4601 | tcp | Piranha2 | Primark Corporation | Primark Corporation | ||||||
| piranha2 | 4601 | udp | Piranha2 | Primark Corporation | Primark Corporation | ||||||
| mtsserver | 4602 | tcp | EAX MTS Server | Pedro A Rodriguez | Pedro A Rodriguez | 2008-08-06 | |||||
| 4602 | udp | Reserved | |||||||||
| menandmice-upg | 4603 | tcp | Men & Mice Upgrade Agent | Eggert Thorlacius | Eggert Thorlacius | 2010-01-27 | |||||
| 4603 | udp | Reserved | |||||||||
| irp | 4604 | tcp | Identity Registration Protocol | Sixscape Communications, Pte. Ltd. | Lawrence E. Hughes | 2014-03-17 | 2014-08-26 | ||||
| 4604 | udp | Reserved | |||||||||
| sixchat | 4605 | tcp | Direct End to End Secure Chat Protocol | Sixscape Communications, Pte. Ltd. | Lawrence E. Hughes | 2014-09-11 | |||||
| 4605 | udp | Reserved | |||||||||
| sixid | 4606 | tcp | Secure ID to IP registration and lookup | Sixscape Communications, Pte. Ltd. | Lawrence E. Hughes | 2020-04-28 | |||||
| 4606 | udp | Reserved | |||||||||
| 4607-4620 | Unassigned | ||||||||||
| 4621 | tcp | Reserved | |||||||||
| ventoso | 4621 | udp | Bidirectional single port remote radio VOIP and Control stream | Ventoso Integrated Peripherals | John Lindsey | 2016-03-04 | |||||
| 4622-4645 | Unassigned | ||||||||||
| 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 | |||
| 4647-4657 | Unassigned | ||||||||||
| playsta2-app | 4658 | tcp | PlayStation2 App Port | ||||||||
| playsta2-app | 4658 | udp | PlayStation2 App Port | ||||||||
| 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 | |||||
| smaclmgr | 4660 | tcp | smaclmgr | Hiromi Taki | Hiromi Taki | ||||||
| smaclmgr | 4660 | udp | smaclmgr | Hiromi Taki | Hiromi Taki | ||||||
| kar2ouche | 4661 | tcp | Kar2ouche Peer location service | Andy Krouwel | Andy Krouwel | ||||||
| kar2ouche | 4661 | udp | Kar2ouche Peer location service | Andy Krouwel | Andy Krouwel | ||||||
| oms | 4662 | tcp | OrbitNet Message Service | Roy Davies | Roy Davies | 2005-08 | |||||
| oms | 4662 | udp | OrbitNet Message Service | Roy Davies | Roy Davies | 2005-08 | |||||
| noteit | 4663 | tcp | Note It! Message Service | Pedro Alpedrinha | Pedro Alpedrinha | 2006-02 | |||||
| noteit | 4663 | udp | Note It! Message Service | Pedro Alpedrinha | Pedro Alpedrinha | 2006-02 | |||||
| ems | 4664 | tcp | Rimage Messaging Server | David V. Raskin | David V. Raskin | 2006-02 |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Amahi | iana&amahi.org | 2014-02-27 | |
| Andrei Litvinn | support&asigra.com | 2005-01 | |
| Andy Krouwel | andy&kar2ouche.com | ||
| Benjamin Kowarsch | benjamin&sunrise-tel.com | 2004-11 | |
| Brad Johanson | bradj&tidebreak.com | 2005-08 | |
| Bruno Frechette | Creation Newmood Inc. | bruno&newmood.com | 2026-09-30 |
| Carlos Puchol | Amahi | iana&amahi.org | 2014-02-27 |
| Creation Newmood Inc. | it&newmood.com | 2026-09-30 | |
| David McConkie | StorageCraft Technology Corporation | dave.mcconkie&storagecraft.com | 2014-12-17 |
| David Ott | dott&qualcomm.com | 2010-10-15 | |
| David V. Raskin | draskin&rimage.com | 2006-02 | |
| Eggert Thorlacius | eggi&menandmice.com | 2010-01-27 | |
| Erlang/OTP support | epmd&erix.ericsson.se | 2004-12 | |
| Eyal Yardeni | eyal.yardeni&smarts.com | 2003-11 | |
| Feitian Technologies | product&ftsafe.com | 2010-09-15 | |
| Hiromi Taki | stg-togo&saint.nm.fujitsu.co.jp | ||
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| Jean-Paul Lemaire | jean-paul.lemaire&univ-paris-diderot.fr | 2007-07-05 | |
| Joe Wesley | joe.wesley&east.sun.com | ||
| John Lindsey | john.lindsey&nilesradio.com | 2016-03-04 | |
| Kim Alan Waggoner | kimw&weatherbank.com | 2006-11 | |
| Larry Zarou | zarla01&cbsits.com | 2006-10 | |
| Lawrence E. Hughes | Sixscape Communications, Ltd. | lhughes&sixscape.com | 2014-03-17 |
| Michael Richardson | mcr&sandelman.ca | 2011-02-08 | |
| Nigel Warren | info&flyobjectspace.com | 2009-02-12 | |
| Noam Rimon | noam.rimon&playstation.sony.com | 2004-12 | |
| Paul Ballew | ballew&projtech.com | ||
| Pedro A Rodriguez | pedro.rdz&eaxtechnologies.com.mx | 2008-08-06 | |
| Pedro Alpedrinha | pedro.alpedrinha&redevirtual.com | 2006-02 | |
| Portnoy Boxman | portnoy_boxman&bmc.com | 2005-01 | |
| Primark Corporation | joe.boone&primark.com | ||
| Rehan Mahmood | rehan&matrixmultimedia.co.uk | 2009-03-18 | |
| Resource Allocation Team | resources&littlehall.com | 2010-09-27 | |
| Roy Davies | rdavies&daq.net | 2005-08 | |
| Sixscape Communications, Pte. Ltd. | lhughes&sixscape.com | 2014-08-26 | |
| StorageCraft Technology Corporation | dave.mcconkie&storagecraft.com | 2014-12-17 | |
| Thomas Koell | info&sf.com | ||
| Ventoso Integrated Peripherals | john.lindsey&nilesradio.com | 2016-03-04 | |
| Yilei Jia | yjia&navcomtech.com | 2009-03-18 |