Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-11-04
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2194-2196 | Unassigned | Unauthorized Use Known on ports 2194-2196 | |||||||||
| terabase | 4000 | tcp | Terabase | Thor Olson | Thor Olson | Potential Conflict of ports PORT 4000 also used by ICQ <www.icq.com> | |||||
| terabase | 4000 | udp | Terabase | Thor Olson | Thor Olson | Potential Conflict of ports PORT 4000 also used by ICQ <www.icq.com> | |||||
| 4489-4499 | Unassigned | Known UNAUTHORIZED USE: Ports 4490 and 4491 | |||||||||
| cp-spxrpts | 5079 | udp | Cambridge Pixel SPx Reports | Richard Warren | Richard Warren | 2008-09-17 | |||||
| esri-sde | 5151 | tcp | ESRI SDE Instance IANA assigned this well-formed service name as a replacement for "esri_sde". |
Peter Aronson | Peter Aronson | Unauthorized Use Known on ports 5151 and 5152 | |||||
| esri-sde | 5151 | udp | ESRI SDE Remote Start IANA assigned this well-formed service name as a replacement for "esri_sde". |
Peter Aronson | Peter Aronson | Unauthorized Use Known on ports 5151 and 5152 | |||||
| sde-discovery | 5152 | tcp | ESRI SDE Instance Discovery | Peter Aronson | Peter Aronson | Unauthorized Use Known on ports 5151 and 5152 | |||||
| sde-discovery | 5152 | udp | ESRI SDE Instance Discovery | Peter Aronson | Peter Aronson | Unauthorized Use Known on ports 5151 and 5152 | |||||
| PS-Server | 7215 | tcp | Communication ports for PaperStream Server services | PFU Systems Inc. | Hari Asuri | 2016-02-26 | |||||
| 8616-8664 | Unassigned | Unauthorized Use Known on ports 8616 and 8617 | |||||||||
| ssports-bcast | 8808 | udp | STATSports Broadcast Service | Statsports_International | Catalin Caranfil | 2016-12-22 | |||||
| netserialext1 | 16360 | tcp | Network Serial Extension Ports One | Michael J Hoy | Michael J Hoy | ||||||
| netserialext1 | 16360 | udp | Network Serial Extension Ports One | Michael J Hoy | Michael J Hoy | ||||||
| netserialext2 | 16361 | tcp | Network Serial Extension Ports Two | Michael J Hoy | Michael J Hoy | ||||||
| netserialext2 | 16361 | udp | Network Serial Extension Ports Two | Michael J Hoy | Michael J Hoy | ||||||
| netserialext3 | 16367 | tcp | Network Serial Extension Ports Three | Michael J Hoy | Michael J Hoy | ||||||
| netserialext3 | 16367 | udp | Network Serial Extension Ports Three | Michael J Hoy | Michael J Hoy | ||||||
| netserialext4 | 16368 | tcp | Network Serial Extension Ports Four | Michael J Hoy | Michael J Hoy | ||||||
| netserialext4 | 16368 | udp | Network Serial Extension Ports Four | Michael J Hoy | Michael J Hoy | ||||||
| 27018-27344 | Unassigned | Unauthorized Use Known on ports 27018 and 27019 | |||||||||
| 28011-28079 | Unassigned | Unauthorized Use Known on ports 28017, 28018 and 28019 | |||||||||
| 33436-33655 | Unassigned | Known Unauthorized Use on ports 33436-33534 | |||||||||
| ciscocsdb | 43441 | tcp | Cisco NetMgmt DB Ports | Cisco Systems | Cisco Systems | 2005-11 | |||||
| ciscocsdb | 43441 | udp | Cisco NetMgmt DB Ports | Cisco Systems | Cisco Systems | 2005-11 | |||||
| 44446-44543 | Unassigned | Known UNAUTHORIZED USE: Ports 44515 & 44516 |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Catalin Caranfil | c.caranfil&statsports.com | 2016-12-22 | |
| Cisco Systems | nmtg-port-numbers&cisco.com | 2005-11 | |
| Hari Asuri | hasuri.pfu&us.fujitsu.com | 2016-02-26 | |
| Michael J Hoy | mhoy&canberra-abq.com | ||
| Peter Aronson | paronson&esri.com | ||
| PFU Systems Inc. | hasuri.pfu&us.fujitsu.com | 2016-02-26 | |
| Richard Warren | richard&cambridgepixel.com | 2008-09-17 | |
| Statsports_International | iana_liaison&statsports.com | 2016-12-22 | |
| Thor Olson | Thor&terabase.com |