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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| discard | 9 | dccp | Discard | Eddie Kohler | Eddie Kohler | RFC 4340 | 1145656131 | ||||
| 34 | tcp | Unassigned | |||||||||
| 34 | udp | Unassigned | |||||||||
| ingres-net | 134 | tcp | INGRES-NET Service | Mike Berrow | Mike Berrow | ||||||
| ingres-net | 134 | udp | INGRES-NET Service | Mike Berrow | Mike Berrow | ||||||
| 334-343 | Unassigned | ||||||||||
| pdap | 344 | tcp | Prospero Data Access Protocol | B. Clifford Neuman | B. Clifford Neuman | ||||||
| pdap | 344 | udp | Prospero Data Access Protocol | B. Clifford Neuman | B. Clifford Neuman | ||||||
| pawserv | 345 | tcp | Perf Analysis Workbench | ||||||||
| pawserv | 345 | udp | Perf Analysis Workbench | ||||||||
| zserv | 346 | tcp | Zebra server | ||||||||
| zserv | 346 | udp | Zebra server | ||||||||
| fatserv | 347 | tcp | Fatmen Server | ||||||||
| fatserv | 347 | udp | Fatmen Server | ||||||||
| csi-sgwp | 348 | tcp | Cabletron Management Protocol | ||||||||
| csi-sgwp | 348 | udp | Cabletron Management Protocol | ||||||||
| mftp | 349 | tcp | mftp | Dave Feinleib | Dave Feinleib | ||||||
| mftp | 349 | udp | mftp | Dave Feinleib | Dave Feinleib | ||||||
| mobileip-agent | 434 | tcp | MobileIP-Agent | ||||||||
| mobileip-agent | 434 | udp | MobileIP-Agent | ||||||||
| windream | 534 | tcp | windream Admin | Uwe Honermann | Uwe Honermann | ||||||
| windream | 534 | udp | windream Admin | Uwe Honermann | Uwe Honermann | ||||||
| ginad | 634 | tcp | ginad | Mark Crother | Mark Crother | ||||||
| ginad | 634 | udp | ginad | Mark Crother | Mark Crother | ||||||
| epp | 700 | tcp | Extensible Provisioning Protocol | RFC 5734 | |||||||
| epp | 700 | udp | EPP running over QUIC | IESG | IETF Chair | 2026-07-23 | RFC 5734; RFC-ietf-regext-epp-quic-12 | ||||
| 834-846 | Unassigned | ||||||||||
| apex-edge | 913 | tcp | APEX endpoint-relay service | RFC 3340 | |||||||
| apex-edge | 913 | udp | APEX endpoint-relay service | RFC 3340 | |||||||
| activesync | 1034 | tcp | ActiveSync Notifications | Sandra Vargas | Sandra Vargas | 2003-03 | |||||
| activesync | 1034 | udp | ActiveSync Notifications | Sandra Vargas | Sandra Vargas | 2003-03 | |||||
| aplx | 1134 | tcp | MicroAPL APLX | Richard Nabavi | Richard Nabavi | 2006-02 | |||||
| aplx | 1134 | udp | MicroAPL APLX | Richard Nabavi | Richard Nabavi | 2006-02 | |||||
| search-agent | 1234 | tcp | Infoseek Search Agent | Jackie Wu | Jackie Wu | ||||||
| search-agent | 1234 | udp | Infoseek Search Agent | Jackie Wu | Jackie Wu | ||||||
| writesrv | 1334 | tcp | writesrv | Marvin Toungate | Marvin Toungate | ||||||
| writesrv | 1334 | udp | writesrv | Marvin Toungate | Marvin Toungate | ||||||
| naap | 1340 | tcp | NAAP | Henry Haverinen | Henry Haverinen | ||||||
| naap | 1340 | udp | NAAP | Henry Haverinen | Henry Haverinen | ||||||
| qubes | 1341 | tcp | QuBES | Eric Grange | Eric Grange | ||||||
| qubes | 1341 | udp | QuBES | Eric Grange | Eric Grange | ||||||
| esbroker | 1342 | tcp | ESBroker | Alexander Medvinsky | Alexander Medvinsky | ||||||
| esbroker | 1342 | udp | ESBroker | Alexander Medvinsky | Alexander Medvinsky | ||||||
| re101 | 1343 | tcp | re101 | Doriano Blengino | Doriano Blengino | ||||||
| re101 | 1343 | udp | re101 | Doriano Blengino | Doriano Blengino | ||||||
| icap | 1344 | tcp | ICAP | Jeremy Elson | Jeremy Elson | ||||||
| icap | 1344 | udp | ICAP | Jeremy Elson | Jeremy Elson | ||||||
| vpjp | 1345 | tcp | VPJP | Michael Collins | Michael Collins | ||||||
| vpjp | 1345 | udp | VPJP | Michael Collins | Michael Collins | ||||||
| alta-ana-lm | 1346 | tcp | Alta Analytics License Manager | ||||||||
| alta-ana-lm | 1346 | udp | Alta Analytics License Manager | ||||||||
| bbn-mmc | 1347 | tcp | multi media conferencing | ||||||||
| bbn-mmc | 1347 | udp | multi media conferencing | ||||||||
| bbn-mmx | 1348 | tcp | multi media conferencing | ||||||||
| bbn-mmx | 1348 | udp | multi media conferencing | ||||||||
| sbook | 1349 | tcp | Registration Network Protocol | ||||||||
| sbook | 1349 | udp | Registration Network Protocol | ||||||||
| ms-sql-m | 1434 | tcp | Microsoft-SQL-Monitor | Peter Hussey | Peter Hussey | ||||||
| ms-sql-m | 1434 | udp | Microsoft-SQL-Monitor | Peter Hussey | Peter Hussey | ||||||
| micromuse-lm | 1534 | tcp | micromuse-lm | Adam Kerrison | Adam Kerrison | ||||||
| micromuse-lm | 1534 | udp | micromuse-lm | Adam Kerrison | Adam Kerrison | ||||||
| loaprobe | 1634 | tcp | Log On America Probe | James Tavares | James Tavares | ||||||
| loaprobe | 1634 | udp | Log On America Probe | James Tavares | James Tavares | ||||||
| cambertx-lm | 1734 | tcp | Camber Corporation License Management | Jeannie Burleson | Jeannie Burleson | ||||||
| cambertx-lm | 1734 | udp | Camber Corporation License Management | Jeannie Burleson | Jeannie Burleson | ||||||
| ardusuni | 1834 | tcp | ARDUS Unicast | ||||||||
| ardusuni | 1834 | udp | ARDUS Unicast | ||||||||
| xaapi | 1934 | tcp | IBM LM Appl Agent | Helga Wolin | Helga Wolin | ||||||
| xaapi | 1934 | udp | IBM LM Appl Agent | Helga Wolin | Helga Wolin | ||||||
| scoremgr | 2034 | tcp | |||||||||
| scoremgr | 2034 | udp | |||||||||
| avenue | 2134 | tcp | AVENUE | Jason Cater | Jason Cater | ||||||
| avenue | 2134 | udp | AVENUE | Jason Cater | Jason Cater | ||||||
| directplay | 2234 | tcp | DirectPlay | Ajay Jindal | Ajay Jindal | ||||||
| directplay | 2234 | udp | DirectPlay | Ajay Jindal | Ajay Jindal | ||||||
| ace-client | 2334 | tcp | ACE Client Auth | ||||||||
| ace-client | 2334 | udp | ACE Client Auth | ||||||||
| 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". |