Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-10-08
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
http 80 tcp World Wide Web HTTP [IESG] [IETF_Chair] 2021-10-01 [RFC9110] Defined TXT keys: u=<username> p=<password> path=<path to document>
http 80 udp World Wide Web HTTP [IESG] [IETF_Chair] 2021-10-01 [RFC9110] Defined TXT keys: u=<username> p=<password> path=<path to document>
www 80 tcp World Wide Web HTTP [IESG] [IETF_Chair] 2021-10-01 [RFC9110] This is a duplicate of the "http" service and should not be used for discovery purposes.
www 80 udp World Wide Web HTTP [IESG] [IETF_Chair] 2021-10-01 [RFC9110] This is a duplicate of the "http" service and should not be used for discovery purposes.
www-http 80 tcp World Wide Web HTTP [Tim_Berners_Lee] [Tim_Berners_Lee] This is a duplicate of the "http" service and should not be used for discovery purposes. u=<username> p=<password> path=<path to document> (see txtrecords.html#http) Known Subtypes: _printer NOTE: The meaning of this service type, though called just "http", actually denotes something more precise than just "any data transported using HTTP". The DNS-SD service type "http" should only be used to advertise content that: * is served over HTTP, * can be displayed by "typical" web browser client software, and * is intented primarily to be viewed by a human user. Of course, the definition of "typical web browser" is subjective, and may change over time, but for practical purposes the DNS-SD service type "http" can be understood as meaning "human-readable HTML content served over HTTP". In some cases other widely-supported content types may also be appropriate, such as plain text over HTTP, or JPEG image over HTTP. Content types not intented primarily for viewing by a human user, or not widely-supported in web browsing clients, should not be advertised as DNS-SD service type "http", even if they do happen to be transported over HTTP. Such types should be advertised as their own logical service type with their own DNS-SD service type, for example, XUL (XML User Interface Language) transported over HTTP is advertised explicitly as DNS-SD service type "xul-http".
www-http 80 udp World Wide Web HTTP [Tim_Berners_Lee] [Tim_Berners_Lee] This is a duplicate of the "http" service and should not be used for discovery purposes. u=<username> p=<password> path=<path to document> (see txtrecords.html#http) Known Subtypes: _printer NOTE: The meaning of this service type, though called just "http", actually denotes something more precise than just "any data transported using HTTP". The DNS-SD service type "http" should only be used to advertise content that: * is served over HTTP, * can be displayed by "typical" web browser client software, and * is intented primarily to be viewed by a human user. Of course, the definition of "typical web browser" is subjective, and may change over time, but for practical purposes the DNS-SD service type "http" can be understood as meaning "human-readable HTML content served over HTTP". In some cases other widely-supported content types may also be appropriate, such as plain text over HTTP, or JPEG image over HTTP. Content types not intented primarily for viewing by a human user, or not widely-supported in web browsing clients, should not be advertised as DNS-SD service type "http", even if they do happen to be transported over HTTP. Such types should be advertised as their own logical service type with their own DNS-SD service type, for example, XUL (XML User Interface Language) transported over HTTP is advertised explicitly as DNS-SD service type "xul-http".
http 80 sctp HTTP [Randall_Stewart] [Randall_Stewart] 2022-02-07 [RFC9260] Defined TXT keys: u=<username> p=<password> path=<path to document>
http-mgmt 280 tcp http-mgmt [Adrian_Pell] [Adrian_Pell]
http-mgmt 280 udp http-mgmt [Adrian_Pell] [Adrian_Pell]
http-alt 591 tcp FileMaker, Inc. - HTTP Alternate (see Port 80) [Clay_Maeckel] [Clay_Maeckel]
http-alt 591 udp FileMaker, Inc. - HTTP Alternate (see Port 80) [Clay_Maeckel] [Clay_Maeckel]
ipps 631 tcp Internet Printing Protocol over HTTPS [IESG] [IETF_Chair] 2018-07-06 [RFC8011]
webpush 1001 tcp HTTP Web Push [IESG] [IETF_Chair] 2016-11-01 [RFC8030]
httpx 4180 tcp HTTPX [Paul_McGough] [Paul_McGough] 2007-02
httpx 4180 udp HTTPX [Paul_McGough] [Paul_McGough] 2007-02 2016-01-05
xmpp-bosh 5280 tcp Bidirectional-streams Over Synchronous HTTP (BOSH) [Peter_Saint_Andre] [Peter_Saint_Andre] 2009-11-25
sun-sr-http 6480 tcp Service Registry Default HTTP Domain [Paul_Sterk] [Paul_Sterk] 2006-03
sun-sr-http 6480 udp Service Registry Default HTTP Domain [Paul_Sterk] [Paul_Sterk] 2006-03
asr 7800 tcp Apple Software Restore [Jim_Kateley][Shantonu_Sen] [Jim_Kateley][Shantonu_Sen] 2006-01 Defined TXT keys: image=<HTTP URL of disk image>
asr 7800 udp Apple Software Restore [Jim_Kateley][Shantonu_Sen] [Jim_Kateley][Shantonu_Sen] 2006-01 Defined TXT keys: image=<HTTP URL of disk image>
http-alt 8008 tcp HTTP Alternate [James_Gettys] [James_Gettys]
http-alt 8008 udp HTTP Alternate [James_Gettys] [James_Gettys]
http-alt 8080 tcp HTTP Alternate (see port 80) [Stephen_Casner] [Stephen_Casner]
http-alt 8080 udp HTTP Alternate (see port 80) [Stephen_Casner] [Stephen_Casner]
websnp 8084 tcp Snarl Network Protocol over HTTP [full_phat_products] [Chris_Peel_2] 2019-08-08
radan-http 8088 tcp Radan HTTP [Steve_Hay] [Steve_Hay] 2008-06-13
radan-http 8088 udp Radan HTTP [Steve_Hay] [Steve_Hay] 2008-06-13
synapse-nhttp 8280 tcp Synapse Non Blocking HTTP [Ruwan_Linton] [Ruwan_Linton] 2008-06-05
synapse-nhttp 8280 udp Synapse Non Blocking HTTP [Ruwan_Linton] [Ruwan_Linton] 2008-06-05
nbd 10809 tcp Network Block Device [Wouter_Verhelst] [Wouter_Verhelst] 2010-08-02 2024-04-30 [https://github.com/NetworkBlockDevice/nbd/blob/master/doc/proto.md]
bveapi 10880 tcp BVEssentials HTTP API [Tri_Tech_Computers_Ltd] [James_Emerton] 2012-11-19
bveapi 10880 udp BVEssentials HTTP API [Tri_Tech_Computers_Ltd] [James_Emerton] 2012-11-19
tcc-http 24680 tcp TCC User HTTP Service [Brian_Kennedy] [Brian_Kennedy] 2006-08
tcc-http 24680 udp TCC User HTTP Service [Brian_Kennedy] [Brian_Kennedy] 2006-08
timezone tcp Time Zone Data Distribution Service - non-TLS [IESG] [IETF_Chair] 2015-08-03 [RFC7808] This is an extension of the http service. Defined TXT keys: path=<context path> (as per Section 6 of [RFC6763]).
timezones tcp Time Zone Data Distribution Service - over TLS [IESG] [IETF_Chair] 2015-08-03 [RFC7808] This is an extension of the https service. Defined TXT keys: path=<context path> (as per Section 6 of [RFC6763]).

Contact Information

ID Name Organization Contact URI Last Updated
[Adrian_Pell] Adrian Pell mailto:PELL_ADRIAN/HP-UnitedKingdom_om6@hplb.hpl.hp.com
[Brian_Kennedy] Brian Kennedy mailto:BrianK&targetedconvergence.com 2006-08
[Chris_Peel_2] Chris Peel mailto:chris.gsi&fullphat.net 2014-05-16
[Clay_Maeckel] Clay Maeckel mailto:clay&claris.com 2023-09-12
[full_phat_products] full phat products mailto:chris.gsi&fullphat.net 2019-08-08
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[James_Emerton] James Emerton Tri Tech Computers Ltd. mailto:james&tri-tech.com 2012-11-19
[James_Gettys] James Gettys mailto:jg&w3.org
[Jim_Kateley] Jim Kateley mailto:asr-dev&group.apple.com 2006-01
[Paul_McGough] Paul McGough mailto:paulmcgough&yahoo.com 2016-01-05
[Paul_Sterk] Paul Sterk mailto:paul.sterk&sun.com 2006-03
[Peter_Saint_Andre] Peter Saint-Andre mailto:stpeter&stpeter.im 2009-11-25
[Randall_Stewart] Randall Stewart IETF TSVWG mailto:rrs&lakerest.net
[Ruwan_Linton] Ruwan Linton mailto:ruwan&wso2.com 2008-08-20
[Shantonu_Sen] Shantonu Sen mailto:ssen&apple.com
[Stephen_Casner] Stephen Casner mailto:casner&precpt.com
[Steve_Hay] Steve Hay mailto:SteveHay&planit.com 2008-06-13
[Tim_Berners_Lee] Tim Berners-Lee mailto:timbl&w3.org
[Tri_Tech_Computers_Ltd] Tri Tech Computers Ltd. mailto:admins&tri-tech.com 2012-11-19
[Wouter_Verhelst] Wouter Verhelst mailto:w&uter.be 2010-08-02