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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| cpq-wbem | 2301 | tcp | Compaq HTTP | Scott Shaffer | Scott Shaffer | ||||||
| cpq-wbem | 2301 | udp | Compaq HTTP | Scott Shaffer | Scott Shaffer | ||||||
| binderysupport | 2302 | tcp | Bindery Support | Narasimha Rao N. | Narasimha Rao N. | ||||||
| binderysupport | 2302 | udp | Bindery Support | Narasimha Rao N. | Narasimha Rao N. | ||||||
| proxy-gateway | 2303 | tcp | Proxy Gateway | Paul Funk | Paul Funk | ||||||
| proxy-gateway | 2303 | udp | Proxy Gateway | Paul Funk | Paul Funk | ||||||
| attachmate-uts | 2304 | tcp | Attachmate UTS | George Gianelos | George Gianelos | ||||||
| attachmate-uts | 2304 | udp | Attachmate UTS | George Gianelos | George Gianelos | ||||||
| mt-scaleserver | 2305 | tcp | MT ScaleServer | Paul Glaubitz | Paul Glaubitz | ||||||
| mt-scaleserver | 2305 | udp | MT ScaleServer | Paul Glaubitz | Paul Glaubitz | ||||||
| tappi-boxnet | 2306 | tcp | TAPPI BoxNet | Richard Spartz | Richard Spartz | ||||||
| tappi-boxnet | 2306 | udp | TAPPI BoxNet | Richard Spartz | Richard Spartz | ||||||
| pehelp | 2307 | tcp | pehelp | Jens Kilian | Jens Kilian | ||||||
| pehelp | 2307 | udp | pehelp | Jens Kilian | Jens Kilian | ||||||
| sdhelp | 2308 | tcp | sdhelp | Annette Klecha | Annette Klecha | ||||||
| sdhelp | 2308 | udp | sdhelp | Annette Klecha | Annette Klecha | ||||||
| sdserver | 2309 | tcp | SD Server | ||||||||
| sdserver | 2309 | udp | SD Server | ||||||||
| sdclient | 2310 | tcp | SD Client | Jeurgen Broesamle | Jeurgen Broesamle | ||||||
| sdclient | 2310 | udp | SD Client | Jeurgen Broesamle | Jeurgen Broesamle | ||||||
| messageservice | 2311 | tcp | Message Service | ||||||||
| messageservice | 2311 | udp | Message Service | ||||||||
| wanscaler | 2312 | tcp | WANScaler Communication Service | Allen Samuels | Allen Samuels | 2006-11 | |||||
| wanscaler | 2312 | udp | WANScaler Communication Service | Allen Samuels | Allen Samuels | 2006-11 | |||||
| iapp | 2313 | tcp | IAPP (Inter Access Point Protocol) | Henri Moelard | Henri Moelard | ||||||
| iapp | 2313 | udp | IAPP (Inter Access Point Protocol) | Henri Moelard | Henri Moelard | ||||||
| cr-websystems | 2314 | tcp | CR WebSystems | Robin Giese | Robin Giese | ||||||
| cr-websystems | 2314 | udp | CR WebSystems | Robin Giese | Robin Giese | ||||||
| precise-sft | 2315 | tcp | Precise Sft. | Michael Landwehr | Michael Landwehr | ||||||
| precise-sft | 2315 | udp | Precise Sft. | Michael Landwehr | Michael Landwehr | ||||||
| sent-lm | 2316 | tcp | SENT License Manager | Pisharath Krishnan | Pisharath Krishnan | ||||||
| sent-lm | 2316 | udp | SENT License Manager | Pisharath Krishnan | Pisharath Krishnan | ||||||
| attachmate-g32 | 2317 | tcp | Attachmate G32 | Bryce Bhatnagar | Bryce Bhatnagar | ||||||
| attachmate-g32 | 2317 | udp | Attachmate G32 | Bryce Bhatnagar | Bryce Bhatnagar | ||||||
| cadencecontrol | 2318 | tcp | Cadence Control | Buck Caldwell | Buck Caldwell | ||||||
| cadencecontrol | 2318 | udp | Cadence Control | Buck Caldwell | Buck Caldwell | ||||||
| infolibria | 2319 | tcp | InfoLibria | Chris Chiotasso | Chris Chiotasso | ||||||
| infolibria | 2319 | udp | InfoLibria | Chris Chiotasso | Chris Chiotasso | ||||||
| siebel-ns | 2320 | tcp | Siebel NS | Gilberto Arnaiz | Gilberto Arnaiz | ||||||
| siebel-ns | 2320 | udp | Siebel NS | Gilberto Arnaiz | Gilberto Arnaiz | ||||||
| rdlap | 2321 | tcp | RDLAP | Robert Wiebe | Robert Wiebe | ||||||
| rdlap | 2321 | udp | RDLAP | Robert Wiebe | Robert Wiebe | ||||||
| ofsd | 2322 | tcp | ofsd | ||||||||
| ofsd | 2322 | udp | ofsd | ||||||||
| 3d-nfsd | 2323 | tcp | 3d-nfsd | Mike Sherrill | Mike Sherrill | ||||||
| 3d-nfsd | 2323 | udp | 3d-nfsd | Mike Sherrill | Mike Sherrill | ||||||
| cosmocall | 2324 | tcp | Cosmocall | Steve Dellutri | Steve Dellutri | ||||||
| cosmocall | 2324 | udp | Cosmocall | Steve Dellutri | Steve Dellutri | ||||||
| ansysli | 2325 | tcp | ANSYS Licensing Interconnect | Suzanne Lorrin | Suzanne Lorrin | Modified: 27 October 2008 | |||||
| ansysli | 2325 | udp | ANSYS Licensing Interconnect | Suzanne Lorrin | Suzanne Lorrin | Modified: 27 October 2008 | |||||
| idcp | 2326 | tcp | IDCP | Keisokugiken Corp. | Keisokugiken Corp. | ||||||
| idcp | 2326 | udp | IDCP | Keisokugiken Corp. | Keisokugiken Corp. | ||||||
| xingcsm | 2327 | tcp | xingcsm | Dave Spencer | Dave Spencer | ||||||
| xingcsm | 2327 | udp | xingcsm | Dave Spencer | Dave Spencer | ||||||
| netrix-sftm | 2328 | tcp | Netrix SFTM | Garrett Herschleb | Garrett Herschleb | ||||||
| netrix-sftm | 2328 | udp | Netrix SFTM | Garrett Herschleb | Garrett Herschleb | ||||||
| nvd | 2329 | tcp | NVD | Peter Weyman | Peter Weyman | ||||||
| nvd | 2329 | udp | NVD | Peter Weyman | Peter Weyman | ||||||
| tscchat | 2330 | tcp | TSCCHAT | Mike Jackson | Mike Jackson | ||||||
| tscchat | 2330 | udp | TSCCHAT | Mike Jackson | Mike Jackson | ||||||
| agentview | 2331 | tcp | AGENTVIEW | Ram Iyer | Ram Iyer | ||||||
| agentview | 2331 | udp | AGENTVIEW | Ram Iyer | Ram Iyer | ||||||
| rcc-host | 2332 | tcp | RCC Host | Martin Shoemaker | Martin Shoemaker | ||||||
| rcc-host | 2332 | udp | RCC Host | Martin Shoemaker | Martin Shoemaker | ||||||
| snapp | 2333 | tcp | SNAPP | Dan Burrows | Dan Burrows | 2009-09-25 | |||||
| snapp | 2333 | udp | SNAPP | Dan Burrows | Dan Burrows | 2009-09-25 | |||||
| ace-client | 2334 | tcp | ACE Client Auth | ||||||||
| ace-client | 2334 | udp | ACE Client Auth | ||||||||
| ace-proxy | 2335 | tcp | ACE Proxy | Riaz Zolfonoon | Riaz Zolfonoon | ||||||
| ace-proxy | 2335 | udp | ACE Proxy | Riaz Zolfonoon | Riaz Zolfonoon | ||||||
| appleugcontrol | 2336 | tcp | Apple UG Control | Gene Tyacke | Gene Tyacke | ||||||
| appleugcontrol | 2336 | udp | Apple UG Control | Gene Tyacke | Gene Tyacke | ||||||
| ideesrv | 2337 | tcp | ideesrv | Marazzi | Marazzi | ||||||
| ideesrv | 2337 | udp | ideesrv | Marazzi | Marazzi | ||||||
| norton-lambert | 2338 | tcp | Norton Lambert | Richard de Mornay | Richard de Mornay | ||||||
| norton-lambert | 2338 | udp | Norton Lambert | Richard de Mornay | Richard de Mornay | ||||||
| 3com-webview | 2339 | tcp | 3Com WebView | Jennifer Grace | Jennifer Grace | ||||||
| 3com-webview | 2339 | udp | 3Com WebView | Jennifer Grace | Jennifer Grace | ||||||
| wrs-registry | 2340 | tcp | WRS Registry IANA assigned this well-formed service name as a replacement for "wrs_registry". |
Christophe Cleraux | Christophe Cleraux | ||||||
| wrs_registry | 2340 | tcp | WRS Registry | Christophe Cleraux | Christophe Cleraux | This entry is an alias to "wrs-registry". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| wrs-registry | 2340 | udp | WRS Registry IANA assigned this well-formed service name as a replacement for "wrs_registry". |
Christophe Cleraux | Christophe Cleraux | ||||||
| wrs_registry | 2340 | udp | WRS Registry | Christophe Cleraux | Christophe Cleraux | This entry is an alias to "wrs-registry". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| xiostatus | 2341 | tcp | XIO Status | Randy Maas | Randy Maas | ||||||
| xiostatus | 2341 | udp | XIO Status | Randy Maas | Randy Maas | ||||||
| manage-exec | 2342 | tcp | Seagate Manage Exec | Jim Flaherty | Jim Flaherty | ||||||
| manage-exec | 2342 | udp | Seagate Manage Exec | Jim Flaherty | Jim Flaherty | ||||||
| nati-logos | 2343 | tcp | nati logos | James Juhasz | James Juhasz | ||||||
| nati-logos | 2343 | udp | nati logos | James Juhasz | James Juhasz | ||||||
| fcmsys | 2344 | tcp | fcmsys | ||||||||
| fcmsys | 2344 | udp | fcmsys | ||||||||
| dbm | 2345 | tcp | dbm | Dean Robson | Dean Robson | ||||||
| dbm | 2345 | udp | dbm | Dean Robson | Dean Robson | ||||||
| redstorm-join | 2346 | tcp | Game Connection Port IANA assigned this well-formed service name as a replacement for "redstorm_join". |
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| redstorm_join | 2346 | tcp | Game Connection Port | This entry is an alias to "redstorm-join". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| redstorm-join | 2346 | udp | Game Connection Port IANA assigned this well-formed service name as a replacement for "redstorm_join". |
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| redstorm_join | 2346 | udp | Game Connection Port | This entry is an alias to "redstorm-join". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| redstorm-find | 2347 | tcp | Game Announcement and Location IANA assigned this well-formed service name as a replacement for "redstorm_find". |
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| redstorm_find | 2347 | tcp | Game Announcement and Location | This entry is an alias to "redstorm-find". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| redstorm-find | 2347 | udp | Game Announcement and Location IANA assigned this well-formed service name as a replacement for "redstorm_find". |
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| redstorm_find | 2347 | udp | Game Announcement and Location | This entry is an alias to "redstorm-find". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||||
| redstorm-info | 2348 | tcp | Information to query for game status IANA assigned this well-formed service name as a replacement for "redstorm_info". |