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 |
|---|---|---|---|---|---|---|---|---|
| — | Not specified | ptp-req | PTP Initiation Request Protocol | Mark Wood | — | — | Service name only | → |
| — | TCP | pulsar | Network service for Pulsar messaging and data sharing mobile app | Volodymyr Pavliuk | 2024-02-19 | — | Service name only | → |
| — | Not specified | puzzle | Protocol used for puzzle games | Michael Thomason | — | — | Service name only | → |
| — | TCP | pvaccess | Experimental Physics and Industrial Control System | Matej Sekoranja | 2012-03-23 | — | Service name only | → |
| — | Not specified | qbox | QBox Appliance Locator | Geoff Back | — | — | Service name only | → |
| — | Not specified | qttp | QuickTime Transfer Protocol | Stuart Cheshire | — | — | Service name only | → |
| — | TCP | quad | Distributed Game Data | Niall Hogg | 2011-10-25 | — | Service name only | → |
| — | Not specified | quinn | Quinn Game Server | Simon Haertel | — | — | Service name only | → |
| — | TCP | qwady-peer | Encrypted nearby Peer media exchange | Qwady Solutions LLC | 2026-07-23 | — | Service name only | → |
| — | TCP | qwizcollab | Broadcast of Qwizdom Presentation sessions for joining by a client, such as Qwizdom Notes+. | Qwizdom, Inc. | 2015-09-21 | — | Service name only | → |
| — | Not specified | rakket | Rakket Client Protocol | Orion Reblitz-Richardson | — | — | Service name only | → |
| — | Not specified | radicle-node | Radicle peer to peer network | Radicle | 2025-08-15 | — | Service name only | → |
| — | Not specified | radiotag | RadioTAG: Event tagging for radio services | Andy Buckingham | — | — | Service name only | → |
| — | Not specified | radiovis | RadioVIS: Visualisation for radio services | Andy Buckingham | — | — | Service name only | → |
| — | Not specified | radioepg | RadioEPG: Electronic Programme Guide for radio services | Andy Buckingham | — | — | Service name only | → |
| — | TCP | radioport | RadioPort Message Service | Bob Iannucci | 2011-11-23 | — | Service name only | → |
| — | UDP | radioport | RadioPort Message Service | Bob Iannucci | 2011-11-23 | — | Service name only | → |
| — | UDP | radiusdtls | Authentication, Accounting, and Dynamic Authorization via the RADIUS protocol. This service name is used to construct the SRV service label "_radiusdtls" for discovery of RADIUS/DTLS servers. | IESG | 2015-03-23 | [RFC7585] | Service name only | → |
| — | TCP | radiustls | Authentication, Accounting, and Dynamic Authorization via the RADIUS protocol. This service name is used to construct the SRV service label "_radiustls" for discovery of RADIUS/TLS servers. | IESG | 2015-03-23 | [RFC7585] | Service name only | → |
| — | TCP | railduino | Model Railroad Messaging | Railduino | 2018-01-08 | — | Service name only | → |
| — | Not specified | raop | Remote Audio Output Protocol (AirTunes) | BonjourDev | — | — | Service name only | → |
| — | TCP | rapta | Industrial IOT self-discovery network | Rapta, Inc | 2022-09-22 | — | Service name only | → |
| — | Not specified | rbr | RBR Instrument Communication | Greg Johnson | — | — | Service name only | → |
| — | Not specified | rce | PowerCard | DeVoeSquared | — | — | Service name only | → |
| — | Not specified | rdp | Windows Remote Desktop Protocol | Jugaari | — | — | Service name only | → |
| — | Not specified | realplayfavs | RealPlayer Shared Favorites | RealNetworks | — | — | Service name only | → |
| — | TCP | recipe-box | The Recipe Box Exchange | Corpus Collusion | 2011-08-23 | — | Service name only | → |
| — | TCP | recipe-sharing | Recipe Sharing Protocol | Daniel G. Taylor | 2007-11 | — | Service name only | → |
| — | TCP | recolive-cc | Remote Camera Control | RecoLive Sàrl | 2012-08-29 | — | Service name only | → |
| — | UDP | recolive-cc | Remote Camera Control | RecoLive Sàrl | 2012-08-29 | — | Service name only | → |
| — | TCP | recordit-itp | Recordit Image Transport Protocol | Freshout | 2014-04-14 | — | Service name only | → |
| — | Not specified | remote | Remote Device Control Protocol | Gregory Dudek | — | — | Service name only | → |
| — | TCP | remotebuddy | Remote Buddy remote control software command and data exchange | IOSPIRIT GmbH | 2014-09-23 | — | Service name only | → |
| — | Not specified | remoteburn | LaCie Remote Burn | Serge DE LUCA | — | — | Service name only | → |
| — | Not specified | renderpipe | ARTvps RenderDrive/PURE Renderer Protocol | Andrew Hoddinott | — | — | Service name only | → |
| — | Not specified | rendezvouspong | RendezvousPong | Math Game House Software | — | — | Service name only | → |
| — | Not specified | renkara-sync | Renkara synchronization protocol | Michael J Primeaux | — | — | Service name only | → |
| — | Not specified | resol-vbus | RESOL VBus | Daniel Wippermann | — | — | Service name only | → |
| — | Not specified | retrospect | Retrospect backup and restore service | Michael Marks | — | — | Service name only | → |
| — | Not specified | rfbc | Remote Frame Buffer Client (Used by VNC viewers in listen-mode) | Ole-Morten Duesund | — | — | Service name only | → |
| — | Not specified | rfid | RFID Reader Mach1(tm) Protocol | Paul Dietrich | — | — | Service name only | → |
| — | TCP | rgb | RGB Spectrum Device Discovery | RGB Spectrum | 2011-10-10 | — | Service name only | → |
| — | Not specified | riousbprint | Remote I/O USB Printer Protocol | Rob Newberry | — | — | Service name only | → |
| — | TCP | roambot | Roambot communication | Roambotics, Inc. | 2013-10-18 | — | Service name only | → |
| — | TCP | robustirc | Like ircu (RFC1459), but failure tolerant due to strong consistency among n>=3 servers | Michael Stapelberg | 2015-01-07 | — | Service name only | → |
| — | Not specified | roku-rcp | Roku Control Protocol | Don Woodward | — | — | Service name only | → |
| — | TCP | roomcast-capi | RoomCast Control Protocol | Colin Corby | 2017-02-01 | — | Service name only | → |
| — | TCP | roomcast-mapi | RoomCast Management Protocol | Colin Corby | 2017-02-01 | — | Service name only | → |
| — | Not specified | rql | RemoteQuickLaunch | Daniel Heffernan | — | — | Service name only | → |
| — | Not specified | rr-disc | Robot Raconteur discovery | Wason Technology, LLC | 2014-01-27 | — | 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