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 |
|---|---|---|---|---|---|---|---|---|
| — | UDP | oscit | Open Sound Control Interface Transfer | Gaspard Bucher | — | — | Service name only | → |
| — | Not specified | ovready | ObjectVideo OV Ready Protocol | Gary Myers | — | — | Service name only | → |
| — | Not specified | owhttpd | OWFS (1-wire file system) web server | Paul H Alfille | — | — | Service name only | → |
| — | Not specified | parentcontrol | Remote Parental Controls | John Scalo | — | — | Service name only | → |
| — | Not specified | passwordwallet | PasswordWallet Data Synchronization Protocol | Sanford Selznick | — | — | Service name only | → |
| — | Not specified | pcast | Mac OS X Podcast Producer Server | Nick Brosnahan | — | — | Service name only | → |
| — | UDP | p2pchat | Peer-to-Peer Chat (Sample Java Bonjour application) | Roger Pantos | — | — | Service name only | → |
| — | TCP | p2pstorage-sec | DataBOND p2p storage | Dell | 2012-11-19 | — | Service name only | → |
| — | TCP | pairandshare | Pair & Share data protocol | Intel | 2011-10-18 | — | Service name only | → |
| — | TCP | panoply | Panoply multimedia composite transfer protocol | Natarajan Balasundara | — | — | Service name only | → |
| — | TCP | parabay-p2p | Parabay P2P protocol | Vishnu Varadaraj | — | — | Service name only | → |
| — | TCP | parity | PA-R-I-Ty (Public Address - Radio - Intercom - Telefony) | ims Info Management Systems AG | 2011-10-20 | — | Service name only | → |
| — | UDP | parity | PA-R-I-Ty (Public Address - Radio - Intercom - Telefony) | ims Info Management Systems AG | 2011-10-20 | — | Service name only | → |
| — | TCP | payload-app | Local and remote file transfers | Didrik Nordström | 2022-12-02 | — | Service name only | → |
| — | UDP | payload-app | Local and remote file transfers | Didrik Nordström | 2022-12-02 | — | Service name only | → |
| — | TCP | pblr | Peblar EV charger | Prodrive Technologies NE B.V. | 2025-01-13 | — | Service name only | → |
| — | Not specified | pgpkey-hkp | Horowitz Key Protocol (HKP) | Marc Horowitz | — | — | Service name only | → |
| — | Not specified | pgpkey-http | PGP Keyserver using HTTP/1.1 | Jeroen Massar | — | — | Service name only | → |
| — | Not specified | pgpkey-https | PGP Keyserver using HTTPS | Jeroen Massar | — | — | Service name only | → |
| — | Not specified | pgpkey-ldap | PGP Keyserver using LDAP | Jeroen Massar | — | — | Service name only | → |
| — | Not specified | pgpkey-mailto | PGP Key submission using SMTP | Jeroen Massar | — | — | Service name only | → |
| — | Not specified | photoparata | Photo Parata Event Photography Software | Sam Carleton | — | — | Service name only | → |
| — | TCP | photoshow | Show Photos over TCP | Hamed Ishbaitah | 2014-07-30 | — | Service name only | → |
| — | TCP | photosmithsync | Photosmith's iPad to Lightroom sync protocol | Photosmith | 2011-10-27 | — | Service name only | → |
| — | Not specified | pictua | Pictua Intercommunication Protocol | Isaack Rasmussen | — | — | Service name only | → |
| — | Not specified | piesync | pieSync Computer to Computer Synchronization | Timothy Wayper | — | — | Service name only | → |
| — | TCP | pipedal | Pi Pedal Web Interface | Robin Davies | 2021-08-18 | — | Service name only | → |
| — | Not specified | piu | Pedestal Interface Unit by RPM-PSI | James Nikolai | — | — | Service name only | → |
| — | Not specified | pkixrep | Public Key Infrastructure Repository Locator Service | — | — | [RFC4386] | Service name only | → |
| — | Not specified | poch | Parallel OperatiOn and Control Heuristic (Pooch) | Dean Dauger | — | — | Service name only | → |
| — | TCP | pochi | A presenter to audience transfer service | Ringo Wathelet | 2018-07-11 | — | Service name only | → |
| — | TCP | podcastproxy | Protocol for communication between Podcast | Moritz Schmale | 2011-10-07 | — | Service name only | → |
| — | Not specified | pokeeye | Communication channel for "Poke Eye" Elgato EyeTV remote controller | Kristoffer Lawson | — | — | Service name only | → |
| — | Not specified | powereasy-erp | PowerEasy ERP | Ulaganathan Sriramulu | — | — | Service name only | → |
| — | Not specified | powereasy-pos | PowerEasy Point of Sale | Murthy Parthasarathi | — | — | Service name only | → |
| — | Not specified | pplayer-ctrl | Piano Player Remote Control | Juraj Zopp | — | — | Service name only | → |
| — | TCP | pres | Presence | — | — | [RFC3861] | Service name only | → |
| — | UDP | pres | Presence | — | — | [RFC3861] | Service name only | → |
| — | Not specified | presence | Peer-to-peer messaging / Link-Local Messaging | XMPP Registrar | — | — | Service name only | → |
| — | Not specified | print-caps | Retrieve a description of a device's print capabilities | Troy Bergstrand | — | — | Service name only | → |
| — | TCP | printopia | Printopia Server | Decisive Tactics, Inc. | 2011-10-24 | — | Service name only | → |
| — | Not specified | profilemac | Profile for Mac medical practice management software | David Sinclair | — | — | Service name only | → |
| — | Not specified | prolog | Prolog | Mike Brady | — | — | Service name only | → |
| — | Not specified | protonet | Protonet node and service discovery protocol | Ali Jelveh | — | — | Service name only | → |
| — | UDP | psap | Progal Service Advertising Protocol | Soren Weber | — | — | Service name only | → |
| — | Not specified | psia | Physical Security Interoperability Alliance Protocol | Frank Yeh | — | — | Service name only | → |
| — | TCP | pstmailsync | File synchronization protocol for Pst Mail Sync | Arrow Bit SL | 2012-04-26 | — | Service name only | → |
| — | TCP | pstmailsync-ssl | Secured file synchronization protocol for Pst Mail Sync | Arrow Bit SL | 2012-04-26 | — | Service name only | → |
| — | Not specified | ptnetprosrv2 | PTNetPro Service | Apple Computer | — | — | Service name only | → |
| — | TCP | ptp-init | Picture Transfer Protocol(PTP) Initiator | Canon Inc. | 2011-10-03 | — | 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