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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| blockade | 2911 | tcp | Blockade | VP - Research & Development | VP - Research & Development | ||||||
| blockade | 2911 | udp | Blockade | VP - Research & Development | VP - Research & Development | ||||||
| epicon | 2912 | tcp | Epicon | Michael Khalandovsky | Michael Khalandovsky | ||||||
| epicon | 2912 | udp | Epicon | Michael Khalandovsky | Michael Khalandovsky | ||||||
| boosterware | 2913 | tcp | Booster Ware | Ido Ben-David | Ido Ben-David | ||||||
| boosterware | 2913 | udp | Booster Ware | Ido Ben-David | Ido Ben-David | ||||||
| gamelobby | 2914 | tcp | Game Lobby | Paul Ford-Hutchinson | Paul Ford-Hutchinson | ||||||
| gamelobby | 2914 | udp | Game Lobby | Paul Ford-Hutchinson | Paul Ford-Hutchinson | ||||||
| tksocket | 2915 | tcp | TK Socket | Dino Ciano | Dino Ciano | 2011-03-02 | |||||
| tksocket | 2915 | udp | TK Socket | Dino Ciano | Dino Ciano | 2011-03-02 | |||||
| elvin-server | 2916 | tcp | Elvin Server IANA assigned this well-formed service name as a replacement for "elvin_server". |
||||||||
| elvin_server | 2916 | tcp | Elvin Server | This entry is an alias to "elvin-server". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| elvin-server | 2916 | udp | Elvin Server IANA assigned this well-formed service name as a replacement for "elvin_server". |
||||||||
| elvin_server | 2916 | udp | Elvin Server | This entry is an alias to "elvin-server". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| elvin-client | 2917 | tcp | Elvin Client IANA assigned this well-formed service name as a replacement for "elvin_client". |
David Arnold | David Arnold | ||||||
| elvin_client | 2917 | tcp | Elvin Client | David Arnold | David Arnold | This entry is an alias to "elvin-client". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| elvin-client | 2917 | udp | Elvin Client IANA assigned this well-formed service name as a replacement for "elvin_client". |
David Arnold | David Arnold | ||||||
| elvin_client | 2917 | udp | Elvin Client | David Arnold | David Arnold | This entry is an alias to "elvin-client". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| kastenchasepad | 2918 | tcp | Kasten Chase Pad | Marc Gauthier | Marc Gauthier | ||||||
| kastenchasepad | 2918 | udp | Kasten Chase Pad | Marc Gauthier | Marc Gauthier | ||||||
| roboer | 2919 | tcp | roboER | Paul Snook | Paul Snook | ||||||
| roboer | 2919 | udp | roboER | Paul Snook | Paul Snook | ||||||
| wkstn-mon | 2991 | tcp | WKSTN-MON | William David | William David | ||||||
| wkstn-mon | 2991 | udp | WKSTN-MON | William David | William David | ||||||
| 1ci-smcs | 3091 | tcp | 1Ci Server Management | Ralf Bensmann | Ralf Bensmann | ||||||
| 1ci-smcs | 3091 | udp | 1Ci Server Management | Ralf Bensmann | Ralf Bensmann | ||||||
| csvr-sslproxy | 3191 | tcp | ConServR SSL Proxy | Mikhail Kruk | Mikhail Kruk | ||||||
| csvr-sslproxy | 3191 | udp | ConServR SSL Proxy | Mikhail Kruk | Mikhail Kruk | ||||||
| sah-lm | 3291 | tcp | S A Holditch & Associates - LM | Randy Hudgens | Randy Hudgens | ||||||
| sah-lm | 3291 | udp | S A Holditch & Associates - LM | Randy Hudgens | Randy Hudgens | ||||||
| savant | 3391 | tcp | SAVANT | Andy Bruce | Andy Bruce | ||||||
| savant | 3391 | udp | SAVANT | Andy Bruce | Andy Bruce | ||||||
| swr-port | 3491 | tcp | SWR Port | Ian Manning | Ian Manning | 2002-05 | |||||
| swr-port | 3491 | udp | SWR Port | Ian Manning | Ian Manning | 2002-05 | |||||
| gtrack-server | 3591 | tcp | LOCANIS G-TRACK Server | ||||||||
| gtrack-server | 3591 | udp | LOCANIS G-TRACK Server | ||||||||
| magaya-network | 3691 | tcp | Magaya Network Port | Jesus David Rodriguez | Jesus David Rodriguez | 2003-02 | |||||
| magaya-network | 3691 | udp | Magaya Network Port | Jesus David Rodriguez | Jesus David Rodriguez | 2003-02 | |||||
| tvnetworkvideo | 3791 | tcp | TV NetworkVideo Data port | Kevin Brunner | Kevin Brunner | 2003-07 | |||||
| tvnetworkvideo | 3791 | udp | TV NetworkVideo Data port | Kevin Brunner | Kevin Brunner | 2003-07 | |||||
| rtc-pm-port | 3891 | tcp | Oracle RTC-PM port | PV Shivkumar | PV Shivkumar | 2003-10 | |||||
| rtc-pm-port | 3891 | udp | Oracle RTC-PM port | PV Shivkumar | PV Shivkumar | 2003-10 | |||||
| prnrequest | 3910 | tcp | Printer Request Port | Brett Green | Brett Green | 2003-11 | |||||
| prnrequest | 3910 | udp | Printer Request Port | Brett Green | Brett Green | 2003-11 | |||||
| prnstatus | 3911 | tcp | Printer Status Port | Brett Green | Brett Green | 2003-11 | |||||
| prnstatus | 3911 | udp | Printer Status Port | Brett Green | Brett Green | 2003-11 | |||||
| gbmt-stars | 3912 | tcp | Global Maintech Stars | Harry Goldschmitt | Harry Goldschmitt | 2003-11 | |||||
| gbmt-stars | 3912 | udp | Global Maintech Stars | Harry Goldschmitt | Harry Goldschmitt | 2003-11 | |||||
| listcrt-port | 3913 | tcp | ListCREATOR Port | Tomokazu Asai | Tomokazu Asai | 2003-11 | |||||
| listcrt-port | 3913 | udp | ListCREATOR Port | Tomokazu Asai | Tomokazu Asai | 2003-11 | |||||
| listcrt-port-2 | 3914 | tcp | ListCREATOR Port 2 | Tomokazu Asai | Tomokazu Asai | 2003-11 | |||||
| listcrt-port-2 | 3914 | udp | ListCREATOR Port 2 | Tomokazu Asai | Tomokazu Asai | 2003-11 | |||||
| agcat | 3915 | tcp | Auto-Graphics Cataloging | Paul Cope | Paul Cope | 2003-11 | |||||
| agcat | 3915 | udp | Auto-Graphics Cataloging | Paul Cope | Paul Cope | 2003-11 | |||||
| wysdmc | 3916 | tcp | WysDM Controller | Jim McDonald | Jim McDonald | 2003-11 | |||||
| wysdmc | 3916 | udp | WysDM Controller | Jim McDonald | Jim McDonald | 2003-11 | |||||
| aftmux | 3917 | tcp | AFT multiplex port | Alfred Schmidt | Alfred Schmidt | 2003-11 | |||||
| aftmux | 3917 | udp | AFT multiplex port | Alfred Schmidt | Alfred Schmidt | 2003-11 | |||||
| pktcablemmcops | 3918 | tcp | PacketCableMultimediaCOPS | Eric Rosenfeld | Eric Rosenfeld | 2003-11 | |||||
| pktcablemmcops | 3918 | udp | PacketCableMultimediaCOPS | Eric Rosenfeld | Eric Rosenfeld | 2003-11 | |||||
| hyperip | 3919 | tcp | HyperIP | Network Executive Software, Inc. | Nancy Golio | 2003-11 | 2017-01-25 | ||||
| hyperip | 3919 | udp | HyperIP | Network Executive Software, Inc. | Nancy Golio | 2003-11 | 2017-01-25 | ||||
| bv-smcsrv | 3991 | tcp | BindView-SMCServer | ||||||||
| bv-smcsrv | 3991 | udp | BindView-SMCServer | ||||||||
| ewinstaller | 4091 | tcp | EminentWare Installer | ||||||||
| ewinstaller | 4091 | udp | EminentWare Installer | ||||||||
| 4191 | tcp | Reserved | |||||||||
| dsmipv6 | 4191 | udp | Dual Stack MIPv6 NAT Traversal | RFC 5555 | |||||||
| apwi-imserver | 4391 | tcp | American Printware IMServer Protocol | Lech Lakomy | Lech Lakomy | 2009-02-12 | |||||
| 4391 | udp | Reserved | |||||||||
| ntske | 4460 | tcp | Network Time Security Key Establishment | IESG | IETF Chair | 2020-04-07 | RFC 8915 | ||||
| 4489-4499 | Unassigned | Known UNAUTHORIZED USE: Ports 4490 and 4491 | |||||||||
| dtn-bundle | 4556 | tcp | DTN Bundle TCP CL Protocol | IESG | IETF Chair | 2021-02-22 | RFC 9174 | ||||
| l3t-at-an | 4591 | tcp | HRPD L3T (AT-AN) | Avi Lior | Avi Lior | 2009-02-27 | |||||
| l3t-at-an | 4591 | udp | HRPD L3T (AT-AN) | Avi Lior | Avi Lior | 2009-02-27 | |||||
| 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 | |||
| 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 | |||||
| roce | 4791 | udp | IP Routable RocE | InfiniBand Trade Association (IBTA) | Diego Crupnicoff (IBTA TWG Chair) | 2014-10-17 | |||||
| 4791 | tcp | 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 | ||||||||||
| vrt | 4991 | tcp | VITA Radio Transport | Sam Bretheim | Sam Bretheim | 2009-01-08 | |||||
| vrt | 4991 | udp | VITA Radio Transport | Sam Bretheim | Sam Bretheim | 2009-01-08 | |||||
| cxtp | 5091 | sctp | Context Transfer Protocol | 2005-07 | RFC 4065 | ||||||
| aol-1 | 5191 | tcp | AmericaOnline1 | Bruce Mackey | Bruce Mackey | ||||||
| aol-1 | 5191 | udp | AmericaOnline1 | Bruce Mackey | Bruce Mackey | ||||||
| ats-atn | 5910 | tcp | Air Traffic Services applications using ATN | Eivan Cerasi | Greg Saccone | 2008-10-10 | 2022-08-08 | ||||
| ats-atn | 5910 | udp | Air Traffic Services applications using ATN | Eivan Cerasi | Greg Saccone | 2008-10-10 | 2022-08-08 | ||||
| cm | 5910 | sctp | Context Management | Justin Yu | Justin Yu | 2011-05-19 | |||||
| ats-acars | 5911 | tcp | Air Traffic Services applications using ACARS | Eivan Cerasi | Greg Saccone | 2008-10-10 | 2022-08-08 | ||||
| ats-acars | 5911 | udp | Air Traffic Services applications using ACARS | Eivan Cerasi | Greg Saccone | 2008-10-10 | 2022-08-08 | ||||
| cpdlc | 5911 | sctp | Controller Pilot Data Link Communication | Justin Yu | Justin Yu | 2011-05-18 |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Alfred Schmidt | a.schmidt&aft-werdohl.de | 2003-11 | |
| Andreas Foedrowitz | andreas.foedrowitz&thomson.net | 2008-06-18 | |
| Andy Bruce | franklin_yah&yahoo.com | ||
| Avi Lior | avi&bridgewatersystems.com | 2009-02-27 | |
| VP - Research & Development | development&blockade.com | ||
| Brett Green | brett_green&hp.com | 2003-11 | |
| Bruce Mackey | BAMackey&aol.com | ||
| David Arnold | davida&pobox.com | ||
| Diego Crupnicoff (IBTA TWG Chair) | diego&mellanox.com | 2014-10-17 | |
| Dino Ciano | DCiano&tickets.com | 2011-03-02 | |
| Eivan Cerasi | eivan.cerasi&eurocontrol.int | 2022-08-08 | |
| Eric Rosenfeld | e.rosenfeld&cablelabs.com | 2003-11 | |
| Greg Saccone | gregory.t.saccone&boeing.com | 2022-08-08 | |
| Harry Goldschmitt | hgoldschmitt&hgac.com | 2003-11 | |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| Ian Manning | imanning&dtsuk.com | 2002-05 | |
| Ido Ben-David | dgntcom&netvision.net.il | ||
| InfiniBand Trade Association (IBTA) | administration&infinibandta.org | 2014-10-17 | |
| Jesus David Rodriguez | jesusdavid&magaya.com | 2003-02 | |
| Jim McDonald | jim.mcdonald&sysdm.com | 2003-11 | |
| Justin Yu | yyu&mitre.org | 2011-05-25 | |
| Ken Lagarec | klagarec&fibics.com | 2009-04-17 | |
| Kevin Brunner | brunner&tivo.com | 2003-07 | |
| Lech Lakomy | llakomy&apwi.com | 2009-02-12 | |
| Marc Gauthier | mgau&kastenchase.com | ||
| Markus Loeffler | markus.loeffler&thomson.net | 2009-02-17 | |
| Michael Khalandovsky | mlk&epicon.com | ||
| Mikhail Kruk | mkruk&biscom.com | ||
| Nancy Golio | nancy.golio&netex.com | 2017-01-25 | |
| Network Executive Software, Inc. | support&netex.com | 2017-01-25 | |
| Paul Cope | prc&auto-graphics.com | 2003-11 | |
| Paul Ford-Hutchinson | paulfordh&uk.ibm.com | 2003-01 | |
| Paul Snook | paul.snook&itheon.com | ||
| PV Shivkumar | p.shivkumar&oracle.com | 2003-10 | |
| Ralf Bensmann | iana&1ci.de | ||
| Randy Hudgens | rhh&nmail.holditch.com | ||
| Sam Bretheim | info&opensigint.org | 2009-01-08 | |
| Thomas Keller | me&thomaskeller.biz | 2010-12-22 | |
| Tomokazu Asai | asai.tomokazu&pfu.fujitsu.com | 2003-11 | |
| William David | william.david&lmco.com |