Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-02-19
Expert(s)
TCP/UDP: Joe Touch; Eliot Lear, Kumiko Ono, Wes Eddy, Brian Trammell, 
Jana Iyengar, and Michael Scharf
SCTP: Michael Tuexen
DCCP: Eddie Kohler and Yoshifumi Nishida
Reference
[RFC6335]
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 process, as
documented in [RFC6335].

Port numbers are assigned in various ways, based on three ranges: System
Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private
Ports (49152-65535); the different uses of these ranges are described in
[RFC6335]. According to Section 8.1.2 of [RFC6335], System Ports are 
assigned by the "IETF Review" or "IESG Approval" procedures described in 
[RFC8126]. User Ports are assigned by IANA using the "IETF Review" process, 
the "IESG Approval" process, or the "Expert Review" process, as per 
[RFC6335]. Dynamic Ports are not assigned.

The registration procedures for service names and port numbers are
described in [RFC6335].

Assigned ports both System and User ports SHOULD NOT be used without
or prior to IANA registration.

************************************************************************
* PLEASE NOTE THE FOLLOWING:                                           *
*                                                                      *
* 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.                                                   *
************************************************************************

Request an Assignment
  [https://www.iana.org/protocols/apply]

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Service Name Port Number Transport Protocol Description Assignee Contact Registration Date Modification Date Reference Service Code Unauthorized Use Reported Assignment Notes
witap WiTap Sample Game Protocol [Rory_McGuire_2] [Rory_McGuire_2] Defined TXT keys: None
witapvoice witapvoice [Roberto_Garcia] [Roberto_Garcia] Defined TXT keys: None
wkgrpsvr Workgroup Server Discovery [Forest_Hill] [Forest_Hill] Defined TXT keys: None
workstation Workgroup Manager [Kevin_Arnold] [Kevin_Arnold] Defined TXT keys: None
wormhole Roku Cascade Wormhole Protocol [Don_Woodward] [Don_Woodward] Defined TXT keys: txtvers=1
workgroup Novell collaboration workgroup [Brady_Anderson] [Brady_Anderson] Defined TXT keys: version=? description=?
wot tcp W3C WoT Thing Description or Directory [W3C_Web_of_Things_Working_Group] [Kazuyuki_Ashimura] 2022-11-22 2022-12-15

Defined TXT keys:

td: Absolute pathname of the Thing Description of the Thing or Thing Description of the Thing Description Directory.

type: Type of the Thing Description, i.e. "Thing" or "Directory". If omitted, the type is assumed to be Thing.

scheme: Scheme part of URL. One of the following values can be specified, with the standard registered URI interpretations [RFC7595]: http (HTTP over TCP),https (HTTP over TLS/TCP), coap+tcp (CoAP over TCP), or coaps+tcp (CoAP over TLS/TCP). If omitted, the scheme is assumed to be http.

wot udp W3C WoT Thing Description or Directory [W3C_Web_of_Things_Working_Group] [Kazuyuki_Ashimura] 2022-11-22 2022-12-15

Defined TXT keys:

td: Absolute pathname of the Thing Description of the Thing or Thing Description of the Thing Description Directory.

type: Type of the Thing Description, i.e. "Thing" or "Directory". If omitted, the type is assumed to be Thing.

scheme: Scheme part of URL. One of the following values can be specified, with the standard registered URI interpretations [RFC7595]: coap (CoAP over UDP), coaps CoAP over DTLS/UDP. If omitted, the scheme is assumed to be coap.

wpl-ers-http tcp World Programming repository server [World_Programming_Limited] [Thomas_Quarendon] 2017-03-17 Defined TXT keys: None
wpl-ers-zmq tcp World Programming repository server [World_Programming_Limited] [Thomas_Quarendon] 2017-03-17 Defined TXT keys: None
writietalkie Writie Talkie Data Sharing [Yin_Ki_Lau] [Yin_Ki_Lau] Defined TXT keys: None
ws Web Services [Andrew_Donoho] [Andrew_Donoho] Defined TXT keys: None
wtc-heleos Wyatt Technology Corporation HELEOS [Brent_Fulgham] [Brent_Fulgham] Defined TXT keys: None
wtc-qels Wyatt Technology Corporation QELS [Brent_Fulgham] [Brent_Fulgham] Defined TXT keys: None
wtc-rex Wyatt Technology Corporation Optilab rEX [Roy_Reapor] [Roy_Reapor] Defined TXT keys: None
wtc-viscostar Wyatt Technology Corporation ViscoStar [Roy_Reapor] [Roy_Reapor] Defined TXT keys: None
wtc-wpr Wyatt Technology Corporation DynaPro Plate Reader [Brent_Fulgham] [Brent_Fulgham] Defined TXT keys: None
wwdcpic PictureSharing sample code [Marc_Krochmal] [Marc_Krochmal] Defined TXT keys: None
x510 tcp Security service to protocols [ITU-T_Study_Group_17] [Erik_Andersen] 2019-08-13 Defined TXT keys: None
x-on x-on services synchronisation protocol [Matthias_Burghardt] [Matthias_Burghardt] Defined TXT keys: Proprietary
x-plane9 udp x-plane9 [Austin_Meyer] [Austin_Meyer] Defined TXT keys: None
xcodedistcc Xcode Distributed Compiler [Scott_Tooker] [Scott_Tooker] Defined TXT keys: None
xential tcp xential document creation services [Xential] [Michiel_Terpstra] 2013-11-13 Defined TXT keys: None
xgate-rmi xGate Remote Management Interface [Tim_Jobling] [Tim_Jobling] Defined TXT keys: tech=value (string) model=value (string) version=value (string)
xmiserver tcp XMI Systems home terminal local connection [XMI_Systems_SA] [CLAUDE_MALLY] 2013-01-18 Defined TXT keys: coucou
xmp Xperientia Mobile Protocol [Henric_Bergh] [Henric_Bergh] 2007-01 Defined TXT keys: txtvers, user, system, nodeid, desc
xsanclient Xsan Client [Jeff_Albouze] [Jeff_Albouze] Defined TXT keys: None
xsanserver Xsan Server [Jeff_Albouze] [Jeff_Albouze] Defined TXT keys: None
xsansystem Xsan System [Jeff_Albouze] [Jeff_Albouze] Defined TXT keys: None
xtimelicence xTime License [AppMac_Software] [AppMac_Software] Defined TXT keys: None
xtshapro xTime Project [AppMac_Software] [AppMac_Software] Defined TXT keys: None
xul-http XUL (XML User Interface Language) transported over HTTP [Eran_Gampel] [Eran_Gampel] Defined TXT keys: u=<username> p=<password> path=<path to document> (Same as for _http._tcp)
yakumo udp Yakumo iPhone OS Device Control Protocol [Daniel_Heffernan] [Daniel_Heffernan] Defined TXT keys: None
z-wave tcp Z-Wave Service Discovery [Sigma_Designs_Inc] [Anders_Brandt_2] 2011-10-03 Defined TXT keys: NIF, EP, LM
z-wave udp Z-Wave Service Discovery [Sigma_Designs_Inc] [Anders_Brandt_2] 2011-10-03 Defined TXT keys: NIF, EP, LM
zeromq tcp High performance brokerless messaging [Daniel_Holth] [Daniel_Holth] 2012-04-24 Defined TXT keys: type, app, label, note
zeromq udp High performance brokerless messaging [Daniel_Holth] [Daniel_Holth] 2012-04-24 Defined TXT keys: type, app, label, note
zigbee-bridge tcp ZigBee Bridge device [ZigBee_Alliances_Network_Device_working_group] [Leslie_Mulder] 2013-05-28 Defined TXT keys: see: http://www.zigbee.org/Standards/ZigBeeNetworkDevices
zigbee-bridge udp ZigBee Bridge device [ZigBee_Alliances_Network_Device_working_group] [Leslie_Mulder] 2013-05-28 Defined TXT keys: see: http://www.zigbee.org/Standards/ZigBeeNetworkDevices
zigbee-gateway tcp ZigBee IP Gateway [ZigBee_Alliances_Network_Device_working_group] [Leslie_Mulder] 2013-05-28 Defined TXT keys: see: http://www.zigbee.org/Standards/ZigBeeNetworkDevices
zigbee-gateway udp ZigBee IP Gateway [ZigBee_Alliances_Network_Device_working_group] [Leslie_Mulder] 2013-05-28 Defined TXT keys: see: http://www.zigbee.org/Standards/ZigBeeNetworkDevices

Contact Information

ID Name Organization Contact URI Last Updated
[Anders_Brandt_2] Anders Brandt Sigma Designs, Inc. mailto:anders_brandt&sigmadesigns.com 2011-10-03
[Andrew_Donoho] Andrew Donoho mailto:awd&us.ibm.com
[AppMac_Software] AppMac Software mailto:appmac&appmac.com
[Austin_Meyer] Austin Meyer mailto:austin&x-plane.com
[Brady_Anderson] Brady Anderson mailto:banderso&novell.com
[Brent_Fulgham] Brent Fulgham mailto:bfulgham&wyatt.com
[CLAUDE_MALLY] CLAUDE MALLY XMI Systems SA mailto:cma&xmisystems.com 2013-01-18
[Daniel_Heffernan] Daniel Heffernan mailto:me&daniel.ie
[Daniel_Holth] Daniel Holth mailto:dholth&fastmail.fm 2012-04-24
[Don_Woodward] Don Woodward mailto:dwoodward&rokulabs.com
[Eran_Gampel] Eran Gampel mailto:eran&aoe6.net
[Erik_Andersen] Erik Andersen mailto:era&x500.eu 2019-08-13
[Forest_Hill] Forest Hill mailto:forest&apple.com
[Henric_Bergh] Henric Bergh mailto:henric&bergh.nu 2007-01
[ITU-T_Study_Group_17] ITU-T Study Group 17 mailto:era&x500.eu 2019-08-13
[Jeff_Albouze] Jeff Albouze mailto:foup&apple.com
[Kazuyuki_Ashimura] Kazuyuki Ashimura mailto:ashimura&w3.org 2022-11-22
[Kevin_Arnold] Kevin Arnold mailto:imlucid&apple.com
[Leslie_Mulder] Leslie Mulder ZigBee Alliance's Network Device working group mailto:ljm&exegin.com 2013-05-28
[Marc_Krochmal] Marc Krochmal mailto:marc&apple.com
[Matthias_Burghardt] Matthias Burghardt mailto:m.burghardt&x-on.de
[Michiel_Terpstra] Michiel Terpstra mailto:terpstra.m&interactionnext.nl 2013-11-13
[Roberto_Garcia] Roberto Garcia mailto:garcia&apple.com
[Rory_McGuire_2] Rory McGuire mailto:rlpm&apple.com
[Roy_Reapor] Roy Reapor mailto:rreapor&wyatt.com
[Scott_Tooker] Scott Tooker mailto:tooker&apple.com
[Sigma_Designs_Inc] Sigma Designs, Inc. mailto:anders_brandt&sigmadesigns.com 2011-10-03
[Thomas_Quarendon] Thomas Quarendon World Programming Limited mailto:tom.quarendon&worldprogramming.com 2017-04-04
[Tim_Jobling] Tim Jobling mailto:tim&cambridgeimaging.co.uk
[W3C_Web_of_Things_Working_Group] W3C Web of Things Working Group mailto:team-wot&w3.org 2022-11-22
[World_Programming_Limited] World Programming Limited mailto:support&worldprogramming.com 2017-04-04
[Xential] Xential mailto:info&xential.nl 2013-11-13
[XMI_Systems_SA] XMI Systems SA mailto:cma&xmisystems.com 2013-01-18
[Yin_Ki_Lau] Yin Ki Lau mailto:xdt_software&oodot.com
[ZigBee_Alliances_Network_Device_working_group] ZigBee Alliance's Network Device working group mailto:ljm&exegin.com 2013-05-28