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 | dsl-sync | Data Synchronization Protocol for Discovery Software products | John Hogg | — | — | Service name only | → |
| — | Not specified | dtrmtdesktop | Desktop Transporter Remote Desktop Protocol | Daniel Stodle | — | — | Service name only | → |
| — | TCP | duckrace | A communication protocol that allows a school teacher to set work activities to students over a LAN. | Stinky Kitten Limited | 2013-10-03 | — | Service name only | → |
| — | Not specified | dxtgsync | Documents To Go Desktop Sync Protocol | Tim Boyle | — | — | Service name only | → |
| — | Not specified | ea-dttx-poker | Protocol for EA Downtown Texas Hold 'em | Ben Lewis | — | — | Service name only | → |
| — | Not specified | earphoria | Earphoria | Rogue Amoeba | — | — | Service name only | → |
| — | TCP | easyspndlg-sync | Sync service for the Easy Spend Log app | Aaron L. Bratcher | 2011-10-17 | — | Service name only | → |
| — | Not specified | eb-amuzi | Amuzi peer-to-peer session synchronization protocol | Zachary Gramana | — | — | Service name only | → |
| — | TCP | eb-sync | Easy Books App data sync helper for Mac OS X and iOS | Geode Software Ltd | 2014-05-14 | — | Service name only | → |
| — | UDP | eb-sync | Easy Books App data sync helper for Mac OS X and iOS | Geode Software Ltd | 2014-05-14 | — | Service name only | → |
| — | Not specified | ebms | ebXML Messaging | Matthew MacKenzie | — | — | Service name only | → |
| — | Not specified | ecms | Northrup Grumman/Mission Systems/ESL Data Flow Protocol | Dan Goff | — | — | Service name only | → |
| — | Not specified | ebreg | ebXML Registry | Matthew MacKenzie | — | — | Service name only | → |
| — | Not specified | ecbyesfsgksc | Net Monitor Anti-Piracy Service | Guy Meyer | — | — | Service name only | → |
| — | UDP | edcp | LaCie Ethernet Disk Configuration Protocol | Nicolas Bouilleaud | — | — | Service name only | → |
| — | TCP | edge1 | Edge1 Base Station | Skycatch, Inc. | 2018-02-09 | — | Service name only | → |
| — | TCP | edsservice | Provides resolution of EDS services available on a given network | Morpho Detection LLC | 2016-07-19 | — | Service name only | → |
| — | TCP | eeg | EEG System Discovery across local and wide area networks | Shifted Current LLC | 2012-09-11 | — | Service name only | → |
| — | TCP | efkon-elite | EFKON Lightweight Interface to Traffic Events | EFKON AG | 2011-10-20 | — | Service name only | → |
| — | Not specified | egistix | Egistix Auto-Discovery | Dave Lindquist | — | — | Service name only | → |
| — | Not specified | eheap | Interactive Room Software Infrastructure (Event Sharing) | — | — | — | Service name only | → |
| — | Not specified | embrace | DataEnvoy | Rob MacGregor | — | — | Service name only | → |
| — | TCP | enphase-envoy | Enphase Energy Envoy | Enphase Energy, Inc. | 2011-11-08 | — | Service name only | → |
| — | Not specified | ep | Endpoint Protocol (EP) for use in Home Automation systems | Tommy van der Vorst | — | — | Service name only | → |
| — | TCP | esp | Extensis Server Protocol | Loren Barr | 2006-12 | — | Service name only | → |
| — | TCP | est | Enrollment Over Secure Transport | Jack Visoky | 2017-10-06 | — | Service name only | → |
| — | UDP | est-coaps | EST over secure CoAP (EST-coaps) | Toerless Eckert | 2022-05-03 | — | Service name only | → |
| — | Not specified | eucalyptus | Eucalyptus Discovery | Support Team | — | — | Service name only | → |
| — | Not specified | eventserver | Now Up-to-Date | — | — | — | Service name only | → |
| — | TCP | evp | EvP - Generic EVENT protocol | Quentin Glidic | 2013-06-05 | — | Service name only | → |
| — | Not specified | evs-notif | EVS Notification Center Protocol | Eric Gillet | — | — | Service name only | → |
| — | Not specified | ewalletsync | Synchronization Protocol for Ilium Software's eWallet | Dan Amstutz | — | — | Service name only | → |
| — | TCP | ewelink | eWeLink devices supporting LAN Control | Shenzhen CoolKit Technology Co., Ltd. | 2019-01-17 | — | Service name only | → |
| — | Not specified | example | Example Service Type | — | — | — | Service name only | → |
| — | Not specified | exb | Exbiblio Cascading Service Protocol | Claes-Fredrik Mannby | — | — | Service name only | → |
| — | Not specified | extensissn | Extensis Serial Number | Extensis | — | — | Service name only | → |
| — | Not specified | eyetvsn | EyeTV Sharing | Elgato | — | — | Service name only | → |
| — | Not specified | facespan | FaceSpan | Kerry Hazelgren | — | — | Service name only | → |
| — | Not specified | faxstfx | FAXstf | Smith Micro | — | — | Service name only | → |
| — | Not specified | feed-sharing | NetNewsWire 2.0 | Ranchero Software | — | — | Service name only | → |
| — | TCP | feldwesen | proprietary | Kiel University of Applied Sciences | 2016-06-19 | — | Service name only | → |
| — | Not specified | firetask | Firetask task sharing and synchronization protocol | Gerald Aquila | — | — | Service name only | → |
| — | Not specified | fish | Fish | Oriol Ferrer Mesia | — | — | Service name only | → |
| — | TCP | fisk | Fiscalization service of Click.al | Armando Vrushi | 2021-09-27 | — | Service name only | → |
| — | Not specified | fix | Financial Information Exchange (FIX) Protocol | Joakim Johansson | — | — | Service name only | → |
| — | Not specified | fjork | Fjork | John Schilling | — | — | Service name only | → |
| — | UDP | fl-purr | FilmLight Cluster Power Control Service | Darrin Smart | — | — | Service name only | → |
| — | TCP | flightdmp | Flight Data Monitoring Protocol | Brad Head | 2013-02-07 | — | Service name only | → |
| — | UDP | flightdmp | Flight Data Monitoring Protocol | Brad Head | 2013-02-07 | — | Service name only | → |
| — | TCP | flir-ircam | FLIR Infrared Camera | FLIR Systems AB | 2011-10-20 | — | 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