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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| esp-encap | 2797 | udp | esp-encap | Jorn Sierwald | Jorn Sierwald | ||||||
| tmesis-upshot | 2798 | tcp | TMESIS-UPShot | Brian Schenkenberger | Brian Schenkenberger | ||||||
| tmesis-upshot | 2798 | udp | TMESIS-UPShot | Brian Schenkenberger | Brian Schenkenberger | ||||||
| icon-discover | 2799 | tcp | ICON Discover | Alexander Falk | Alexander Falk | ||||||
| icon-discover | 2799 | udp | ICON Discover | Alexander Falk | Alexander Falk | ||||||
| slc-ctrlrloops | 2827 | tcp | slc ctrlrloops | Erwin Hogeweg | Erwin Hogeweg | ||||||
| slc-ctrlrloops | 2827 | udp | slc ctrlrloops | Erwin Hogeweg | Erwin Hogeweg | ||||||
| unimobilectrl | 2927 | tcp | UNIMOBILECTRL | Vikas | Vikas | ||||||
| unimobilectrl | 2927 | udp | UNIMOBILECTRL | Vikas | Vikas | ||||||
| LiebDevMgmt-C | 3027 | tcp | LiebDevMgmt_C IANA assigned this well-formed service name as a replacement for "LiebDevMgmt_C". |
||||||||
| LiebDevMgmt_C | 3027 | tcp | LiebDevMgmt_C | This entry is an alias to "LiebDevMgmt-C". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| LiebDevMgmt-C | 3027 | udp | LiebDevMgmt_C IANA assigned this well-formed service name as a replacement for "LiebDevMgmt_C". |
||||||||
| LiebDevMgmt_C | 3027 | udp | LiebDevMgmt_C | This entry is an alias to "LiebDevMgmt-C". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| ctx-bridge | 3127 | tcp | CTX Bridge Port | Alexander Dubrovsky | Alexander Dubrovsky | ||||||
| ctx-bridge | 3127 | udp | CTX Bridge Port | Alexander Dubrovsky | Alexander Dubrovsky | ||||||
| dwnmshttp | 3227 | tcp | DiamondWave NMS Server | ||||||||
| dwnmshttp | 3227 | udp | DiamondWave NMS Server | ||||||||
| verismart | 3270 | tcp | Verismart | Jay Weber | Jay Weber | ||||||
| verismart | 3270 | udp | Verismart | Jay Weber | Jay Weber | ||||||
| csoft-prev | 3271 | tcp | CSoft Prev Port | Nedelcho Stanev | Nedelcho Stanev | ||||||
| csoft-prev | 3271 | udp | CSoft Prev Port | Nedelcho Stanev | Nedelcho Stanev | ||||||
| user-manager | 3272 | tcp | Fujitsu User Manager | Yukihiko Sakurai | Yukihiko Sakurai | ||||||
| user-manager | 3272 | udp | Fujitsu User Manager | Yukihiko Sakurai | Yukihiko Sakurai | ||||||
| sxmp | 3273 | tcp | Simple Extensible Multiplexed Protocol | admin | admin | ||||||
| sxmp | 3273 | udp | Simple Extensible Multiplexed Protocol | admin | admin | ||||||
| ordinox-server | 3274 | tcp | Ordinox Server | Denis Ducharme | Denis Ducharme | ||||||
| ordinox-server | 3274 | udp | Ordinox Server | Denis Ducharme | Denis Ducharme | ||||||
| samd | 3275 | tcp | SAMD | Edgar Circenis | Edgar Circenis | ||||||
| samd | 3275 | udp | SAMD | Edgar Circenis | Edgar Circenis | ||||||
| maxim-asics | 3276 | tcp | Maxim ASICs | Dave Inman | Dave Inman | ||||||
| maxim-asics | 3276 | udp | Maxim ASICs | Dave Inman | Dave Inman | ||||||
| awg-proxy | 3277 | tcp | AWG Proxy | Alex McDonald | Alex McDonald | ||||||
| awg-proxy | 3277 | udp | AWG Proxy | Alex McDonald | Alex McDonald | ||||||
| lkcmserver | 3278 | tcp | LKCM Server | Javier Jimenez | Javier Jimenez | ||||||
| lkcmserver | 3278 | udp | LKCM Server | Javier Jimenez | Javier Jimenez | ||||||
| admind | 3279 | tcp | admind | Jeff Haynes | Jeff Haynes | ||||||
| admind | 3279 | udp | admind | Jeff Haynes | Jeff Haynes | ||||||
| bbars | 3327 | tcp | BBARS | Lou Harris | Lou Harris | ||||||
| bbars | 3327 | udp | BBARS | Lou Harris | Lou Harris | ||||||
| websphere-snmp | 3427 | tcp | WebSphere SNMP | Richard Mills | Richard Mills | 2002-02 | |||||
| websphere-snmp | 3427 | udp | WebSphere SNMP | Richard Mills | Richard Mills | 2002-02 | |||||
| nut | 3493 | tcp | Network UPS Tools | Network UPS Tools Project | Evgeny Klimov | 2002-05 | 2022-05-18 | RFC 9271 | |||
| beserver-msg-q | 3527 | tcp | VERITAS Backup Exec Server | Katherine Wattwood | Katherine Wattwood | 2002-06 | |||||
| beserver-msg-q | 3527 | udp | VERITAS Backup Exec Server | Katherine Wattwood | Katherine Wattwood | 2002-06 | |||||
| jamserverport | 3627 | tcp | Jam Server Port | Art Pope | Art Pope | 2002-10 | |||||
| jamserverport | 3627 | udp | Jam Server Port | Art Pope | Art Pope | 2002-10 | |||||
| e-mdu | 3727 | tcp | Ericsson Mobile Data Unit | ||||||||
| e-mdu | 3727 | udp | Ericsson Mobile Data Unit | ||||||||
| netmpi | 3827 | tcp | Netadmin Systems MPI service | Göran Runfeldt | Göran Runfeldt | 2007-07-10 | |||||
| netmpi | 3827 | udp | Netadmin Systems MPI service | Göran Runfeldt | Göran Runfeldt | 2007-07-10 | |||||
| natdataservice | 3927 | tcp | ScsTsr | Ghanshyam Patel | Ghanshyam Patel | 2003-11 | |||||
| natdataservice | 3927 | udp | ScsTsr | Ghanshyam Patel | Ghanshyam Patel | 2003-11 | |||||
| bxp | 4027 | tcp | bitxpress | Morgan Doyle | Morgan Doyle | ||||||
| bxp | 4027 | udp | bitxpress | Morgan Doyle | Morgan Doyle | ||||||
| unikeypro | 4127 | tcp | NetUniKeyServer | Raymond Chaw | Raymond Chaw | 2007-05 | |||||
| unikeypro | 4127 | udp | NetUniKeyServer | Raymond Chaw | Raymond Chaw | 2007-05 | |||||
| jaxer-web | 4327 | tcp | Jaxer Web Protocol | Uri Sarid | Uri Sarid | 2008-01-07 | |||||
| jaxer-web | 4327 | udp | Jaxer Web Protocol | Uri Sarid | Uri Sarid | 2008-01-07 | |||||
| drizzle | 4427 | tcp | Drizzle database server | Elliot Murphy | Elliot Murphy | 2008-07-09 | |||||
| 4427 | udp | Reserved | |||||||||
| fcis | 4727 | tcp | F-Link Client Information Service | ||||||||
| fcis-disc | 4727 | udp | F-Link Client Information Service Discovery | Makoto Zukawa | Makoto Zukawa | 2010-10-15 | |||||
| htcp | 4827 | tcp | HTCP | Paul Vixie | Paul Vixie | ||||||
| htcp | 4827 | udp | HTCP | Paul Vixie | Paul Vixie | ||||||
| strexec-s | 5027 | tcp | Storix I/O daemon (stat) | Storix Inc. | David Huffman | 2005-08 | |||||
| strexec-s | 5027 | udp | Storix I/O daemon (stat) | Storix Inc. | David Huffman | 2005-08 | |||||
| perfd | 5227 | tcp | HP System Performance Metric Service | Chris Bertin | Chris Bertin | 2009-05-19 | |||||
| perfd | 5227 | udp | HP System Performance Metric Service | Chris Bertin | Chris Bertin | 2009-05-19 | |||||
| cartographerxmp | 5270 | tcp | Cartographer XMP | Bobby Krupczak | Bobby Krupczak | 2008-04-03 | 2011-08-31 | ||||
| cartographerxmp | 5270 | udp | Cartographer XMP | Bobby Krupczak | Bobby Krupczak | 2008-04-03 | 2011-08-31 | ||||
| cuelink | 5271 | tcp | StageSoft CueLink messaging | Todd Pichler | Todd Pichler | 2010-03-26 | |||||
| cuelink-disc | 5271 | udp | StageSoft CueLink discovery | Todd Pichler | Todd Pichler | 2010-03-26 | |||||
| pk | 5272 | tcp | PK | Patrick Kara | Patrick Kara | ||||||
| pk | 5272 | udp | PK | Patrick Kara | Patrick Kara | ||||||
| 5273-5279 | Unassigned | ||||||||||
| sco-peer-tta | 5427 | tcp | SCO-PEER-TTA | Andrew Shire | Andrew Shire | ||||||
| sco-peer-tta | 5427 | udp | SCO-PEER-TTA | Andrew Shire | Andrew Shire | ||||||
| ninaf | 5627 | tcp | Node Initiated Network Association Forma | Thomas Scholl | Thomas Scholl | 2006-03 | |||||
| ninaf | 5627 | udp | Node Initiated Network Association Forma | Thomas Scholl | Thomas Scholl | 2006-03 | |||||
| asgenf | 5727 | tcp | ASG Event Notification Framework | Arman Bedonian | Arman Bedonian | 2009-07-15 | |||||
| 5727 | udp | Reserved | |||||||||
| 6270-6299 | Unassigned | ||||||||||
| 6327-6342 | Unassigned | ||||||||||
| nexgen | 6627 | tcp | Allied Electronics NeXGen | Lou Seitchik | Lou Seitchik | 2005-08 | |||||
| nexgen | 6627 | udp | Allied Electronics NeXGen | Lou Seitchik | Lou Seitchik | 2005-08 | |||||
| 7027-7029 | Unassigned | ||||||||||
| 7124-7127 | Unassigned | ||||||||||
| ramp | 7227 | tcp | Registry A & M Protocol | John Havard | John Havard | 2003-11 | |||||
| ramp | 7227 | udp | Registry A & M Protocol | John Havard | John Havard | 2003-11 | |||||
| 7263-7271 | Unassigned | ||||||||||
| watchme-7272 | 7272 | tcp | WatchMe Monitoring 7272 | Oliver Heinz | Oliver Heinz | 2005-08 | |||||
| watchme-7272 | 7272 | udp | WatchMe Monitoring 7272 | Oliver Heinz | Oliver Heinz | 2005-08 | |||||
| oma-rlp | 7273 | tcp | OMA Roaming Location | Larry A. Young | Larry A. Young | 2005-08 | |||||
| oma-rlp | 7273 | udp | OMA Roaming Location | Larry A. Young | Larry A. Young | 2005-08 | |||||
| oma-rlp-s | 7274 | tcp | OMA Roaming Location SEC | Larry A. Young | Larry A. Young | 2005-08 | |||||
| oma-rlp-s | 7274 | udp | OMA Roaming Location SEC | Larry A. Young | Larry A. Young | 2005-08 | |||||
| oma-ulp | 7275 | tcp | OMA UserPlane Location | Larry A. Young | Larry A. Young | 2006-02 | |||||
| oma-ulp | 7275 | udp | OMA UserPlane Location | Larry A. Young | Larry A. Young | 2006-02 | |||||
| oma-ilp | 7276 | tcp | OMA Internal Location Protocol | Khiem Tran | Khiem Tran | 2007-11-06 | |||||
| oma-ilp | 7276 | udp | OMA Internal Location Protocol | Khiem Tran | Khiem Tran | 2007-11-06 | |||||
| oma-ilp-s | 7277 | tcp | OMA Internal Location Secure Protocol | Khiem Tran | Khiem Tran | 2007-11-06 |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Alex McDonald | alexm&an.hp.com | ||
| Alexander Dubrovsky | dubrovsky_alex&emc.com | ||
| Alexander Falk | falk&icon.at | ||
| Andrew Shire | sndrewsh&sco.com | ||
| Arman Bedonian | Arman.Bedonian&asg.com | 2009-07-15 | |
| Art Pope | apope&sarnoff.com | 2002-10 | |
| Bobby Krupczak | rdk&krupczak.org | 2008-04-03 | |
| Brian Schenkenberger | VAXman&tmesis.com | ||
| Chris Bertin | chris.bertin&hp.com | 2009-05-19 | |
| David Huffman | sba&storix.com | 2016-03-22 | |
| Dave Inman | davei&mxim.com | ||
| Denis Ducharme | dducharme&softek.com | ||
| Edgar Circenis | ec&fc.hp.com | ||
| Elliot Murphy | elliot.murphy&gmail.com | 2008-07-09 | |
| Erwin Hogeweg | erwin&airtech.demon.nl | ||
| Evgeny Klimov | jimklimov+nut&gmail.com | 2020-12-16 | |
| Göran Runfeldt | goran&netadmin.se | 2007-07-10 | |
| Ghanshyam Patel | gpatel&natinc.com | 2003-11 | |
| Javier Jimenez | |||
| Jay Weber | weber&vfi.com | ||
| Jeff Haynes | haynes&chistech.com | ||
| John Havard | jh&hxe.us | 2003-11 | |
| Jorn Sierwald | joern.sierwald&datafellows.com | ||
| Katherine Wattwood | katherine.wattwood&veritas.com | 2002-06 | |
| Khiem Tran | Khiem.Tran&andrew.com | 2007-11-06 | |
| Larry A. Young | Larry.A.Young&mail.sprint.com | 2005-08 | |
| Larry A. Young | Larry.A.Young&sprint.com | 2006-02 | |
| Lou Harris | lharris&outlx.bandl.com | ||
| Lou Seitchik | lou&alliedelectronics.com | 2005-08 | |
| Makoto Zukawa | zukawa&jp.fujitsu.com | 2010-10-15 | |
| Morgan Doyle | morgan&mpt.ie | ||
| Nedelcho Stanev | decho&iname.com | ||
| Network UPS Tools Project | iana&networkupstools.org | 2020-12-16 | |
| Oliver Heinz | heinz&arago.de | 2005-08 | |
| Patrick Kara | Patrick&eba.net | ||
| Paul Vixie | paul&vix.com | ||
| Raymond Chaw | Raymond&esecutech.com | 2007-05 | |
| Richard Mills | ramills&us.ibm.com | 2002-02 | |
| Storix Inc. | sba&storix.com | 2016-03-22 | |
| Thomas Scholl | tscholl&spf.is-is.ca | 2006-03 | |
| Todd Pichler | todd.pichler&stagesoft.com | 2010-03-26 | |
| Uri Sarid | uri&aptana.com | 2008-01-22 | |
| Vikas | vikas&graycell.com | ||
| Yukihiko Sakurai | y-sakurai&ael.fujitsu.co.jp | ||
| admin | iana&sightlinesystems.com |