Networking reference
TCP & UDP Port Numbers – Service & Protocol Lookup
Search the complete IANA service-name and port-number registry by port, protocol, service, assignee or RFC, including TCP, UDP, SCTP, DCCP and unqualified entries.
| Port | Protocol | Service | Description | Assignee | Registration date | Reference/RFC | Status | Record details |
|---|---|---|---|---|---|---|---|---|
| — | TCP | usp-ctr-http | USP discovery | Broadband Forum | 2017-01-12 | [http://www.broadband-forum.org/assignments] | Service name only | → |
| — | TCP | usp-ctr-mqtt | USP discovery | Broadband Forum | 2020-03-17 | [http://www.broadband-forum.org/assignments] | Service name only | → |
| — | TCP | usp-ctr-stomp | USP discovery | Broadband Forum | 2017-01-12 | [http://www.broadband-forum.org/assignments] | Service name only | → |
| — | TCP | usp-ctr-ws | USP discovery | Broadband Forum | 2017-09-28 | [http://www.broadband-forum.org/assignments] | Service name only | → |
| — | Not specified | uswi | Universal Switching Corporation products | Roger Lemberg | — | — | Service name only | → |
| — | Not specified | utest | uTest | Gregory Power | — | — | Service name only | → |
| — | Not specified | uwsgi | Unbit Web Server Gateway Interface | Roberto De Ioris | — | — | Service name only | → |
| — | TCP | vapix-http | Indicator for VAPIX support over HTTP | Axis Communications | 2023-04-18 | — | Service name only | → |
| — | TCP | vapix-https | Indicator for VAPIX support over HTTPS | Axis Communications | 2023-04-18 | — | Service name only | → |
| — | Not specified | ve-decoder | American Dynamics VideoEdge Decoder Control Service | Gary Sands | — | — | Service name only | → |
| — | Not specified | ve-encoder | American Dynamics VideoEdge Encoder Control Service | Gary Sands | — | — | Service name only | → |
| — | Not specified | ve-recorder | American Dynamics VideoEdge Recorder Control Service | Gary Sands | — | — | Service name only | → |
| — | TCP | vedabase | Application specific synchronization protocol | Peter Kollath | 2014-05-27 | — | Service name only | → |
| — | TCP | vhusb | USB over IP Sharing System | VirtualHere Pty. Ltd. | 2015-04-02 | — | Service name only | → |
| — | Not specified | virtualdj | VirtualDJ Remote Control protocol | Atomix Productions | 2011-10-12 | — | Service name only | → |
| — | Not specified | visel | visel Q-System services | Lehpaner Sasa | — | — | Service name only | → |
| — | TCP | voalte2 | Server location via DNS-SD | Voalte, Inc. | 2019-01-22 | — | Service name only | → |
| — | TCP | voalte3 | Server location via DNS-SD | Voalte, Inc. | 2019-01-22 | — | Service name only | → |
| — | TCP | volterio | Internal Communication Service | Volterio | 2021-07-23 | — | Service name only | → |
| — | Not specified | vos | Virtual Object System (using VOP/TCP) | Reed Hedges; Peter Amstutz | — | — | Service name only | → |
| — | TCP | voxidahmp | RTP Mixer/Summation Resource | Accurate Always Inc. | 2018-12-03 | — | Service name only | → |
| — | TCP | vrmg-p2p | Verimag mobile class protocol over P2P | Verimag, OOO | 2018-07-20 | — | Service name only | → |
| — | Not specified | vue4rendercow | VueProRenderCow | — | — | — | Service name only | → |
| — | Not specified | vxi-11 | VXI-11 TCP/IP Instrument Protocol | Nick Barendt | — | — | Service name only | → |
| — | TCP | wakeywakey | Proprietary | gerry Brown associates | 2012-11-29 | — | Service name only | → |
| — | Not specified | walkietalkie | Walkie Talkie | Johan Kool | — | — | Service name only | → |
| — | UDP | wchr | Powered wheelchair command protocol | Tolt Technologies LLC | 2026-02-25 | — | Service name only | → |
| — | TCP | wd-2go | NAS Service Protocol | Western Digital Inc. | 2012-07-11 | — | Service name only | → |
| — | TCP | wdp | Windows Device Portal | Microsoft Corporation | 2016-03-03 | — | Service name only | → |
| — | TCP | web-xi | HTTP-based protocol for DAQ devices | Spectris plc | 2019-02-13 | — | Service name only | → |
| — | TCP | webex | Cisco WebEx serials products will release Bonjour based service | Mobile Team | 2018-02-09 | — | Service name only | → |
| — | UDP | webex | Cisco WebEx serials products will release Bonjour based service | Mobile Team | 2018-02-09 | — | Service name only | → |
| — | Not specified | we-jell | Proprietary collaborative messaging protocol | Vaughn Amann | — | — | Service name only | → |
| — | Not specified | webdav | World Wide Web Distributed Authoring and Versioning (WebDAV) | Y. Y. Goland | — | — | Service name only | → |
| — | Not specified | webdavs | WebDAV over SSL/TLS | Y. Y. Goland | — | — | Service name only | → |
| — | Not specified | webissync | WebIS Sync Protocol | Alex Kac | — | — | Service name only | → |
| — | Not specified | wedraw | weDraw document sharing protocol | Oleksandr Zakharchuk | — | — | Service name only | → |
| — | Not specified | whamb | Whamb | Whamb | — | — | Service name only | → |
| — | Not specified | whistler | Honeywell Video Systems | Shankar Prasad | — | — | Service name only | → |
| — | TCP | wico | Session-based protocol for embedded unit | WISI Group | 2026-08-11 | — | Service name only | → |
| — | UDP | wicop | WiFi Control Platform | Santorini, LLC | 2011-10-25 | — | Service name only | → |
| — | TCP | wifile | System for transferring files between mobile device and computer in a local network | Artyom Nikolaev | 2016-12-23 | — | Service name only | → |
| — | Not specified | witap | WiTap Sample Game Protocol | Rory McGuire | — | — | Service name only | → |
| — | Not specified | witapvoice | witapvoice | Roberto Garcia | — | — | Service name only | → |
| — | Not specified | wkgrpsvr | Workgroup Server Discovery | Forest Hill | — | — | Service name only | → |
| — | Not specified | workstation | Workgroup Manager | Kevin Arnold | — | — | Service name only | → |
| — | Not specified | wormhole | Roku Cascade Wormhole Protocol | Don Woodward | — | — | Service name only | → |
| — | Not specified | workgroup | Novell collaboration workgroup | Brady Anderson | — | — | Service name only | → |
| — | TCP | wot | W3C WoT Thing Description or Directory | W3C Web of Things Working Group | 2022-11-22 | — | Service name only | → |
| — | UDP | wot | W3C WoT Thing Description or Directory | W3C Web of Things Working Group | 2022-11-22 | — | Service name only | → |
Look up a port number, service name, transport protocol, assignee or RFC in IANA's current registry. The table keeps every row in the 17 August 2026 snapshot, so one port can appear more than once when it has separate TCP, UDP or other registrations.
How to use the port lookup
Enter a number such as 22, 53, 80, 443, 3306 or 8080 to find exact registrations and any registered range containing that port. You can also search for a service such as ssh or mysql, a protocol, an assignee, or reference text such as RFC9110. Use the Protocol and Status filters when a search returns several rows.
Blank values mean the source registry does not provide that field. They have not been guessed. Assignee identifiers are resolved against the people and organisations directory in IANA's XML registry where a readable name is available.
Port ranges and status labels
- System ports: 0–1023. These are also commonly called well-known ports.
- User ports: 1024–49151. IANA can register services in this range.
- Dynamic or private ports: 49152–65535. IANA does not assign services from this range.
Status is a page-level label derived from the source row. Reserved and Unassigned follow IANA's description. Rows whose source text identifies a de-registration or removal are labelled Deprecated or removed. A row with a service name but no port is labelled Service name only. All other rows are labelled Assigned.
Why the same port can have several entries
TCP and UDP are different transport protocols, so the same number can be registered for both without representing the same network conversation. The registry also includes SCTP, DCCP, aliases, historic records and registrations without a specified transport protocol. They remain in this database so the source is not reduced to a hand-picked list.
Common port questions
What service normally uses port 22?
IANA registers ssh on port 22 for TCP and UDP, with an additional SCTP registration. In everyday networks, TCP port 22 is the familiar SSH remote-access service.
Why does port 53 show TCP and UDP?
The domain service is registered on port 53 for both TCP and UDP. DNS software chooses the transport according to the operation and response requirements.
What is the difference between ports 80 and 443?
IANA associates port 80 with HTTP-related service names and port 443 with HTTPS. A registration describes the conventional use; it does not inspect or guarantee the traffic running there.
What uses port 3306?
The registry lists mysql on port 3306 for TCP and UDP. MySQL client connections are ordinarily associated with TCP, but this page retains both official registry rows.
Is port 8080 always an HTTP proxy?
No. IANA registers http-alt on port 8080 for TCP and UDP, but applications can use ports differently. Identify the listening process and configuration before drawing a security conclusion.
Should I open a port because it is registered here?
No. Open only the ports required by a known application and restrict source networks where possible. A registry entry is not a firewall recommendation.
IANA updates the registry as assignments change. Use Report incorrect data if this snapshot no longer matches the official record, and include the IANA or RFC link so the change can be verified.
Provenance