Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2022-11-22
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
ldaps 636 tcp ldap protocol over TLS/SSL (was sldap) [Pat_Richard] [Pat_Richard]
ldaps 636 udp ldap protocol over TLS/SSL (was sldap) [Pat_Richard] [Pat_Richard]
isdc 1636 tcp ISP shared public data control
isdc 1636 udp ISP shared public data control
solve 2636 tcp Solve [Peter_Morrison] [Peter_Morrison]
solve 2636 udp Solve [Peter_Morrison] [Peter_Morrison]
servistaitsm 3636 tcp SerVistaITSM [Ralph_Campbell] [Ralph_Campbell] 2002-11
servistaitsm 3636 udp SerVistaITSM [Ralph_Campbell] [Ralph_Campbell] 2002-11
sfm-db-server 5636 tcp SFMdb - SFM DB server [De_Chih_Chien] [De_Chih_Chien] 2008-10-06
5636 udp Reserved
metaedit-mu 6360 tcp MetaEdit+ Multi-User [Steven_Kelly] [Steven_Kelly] 2007-11-12
metaedit-mu 6360 udp MetaEdit+ Multi-User [Steven_Kelly] [Steven_Kelly] 2007-11-12
6361-6362 Unassigned
ndn 6363 udp Named Data Networking [Regents_of_the_University_of_California] [Jeff_Burke] 2013-10-30
6363 tcp Reserved
6364-6369 Unassigned
6636 tcp Reserved
mpls-udp-dtls 6636 udp Encapsulate MPLS packets in UDP tunnels with DTLS. [IESG] [IETF_Chair] 2015-02-10 [RFC7510]
netserialext1 16360 tcp Network Serial Extension Ports One [Michael_J_Hoy] [Michael_J_Hoy]
netserialext1 16360 udp Network Serial Extension Ports One [Michael_J_Hoy] [Michael_J_Hoy]
netserialext2 16361 tcp Network Serial Extension Ports Two [Michael_J_Hoy] [Michael_J_Hoy]
netserialext2 16361 udp Network Serial Extension Ports Two [Michael_J_Hoy] [Michael_J_Hoy]
16362-16366 Unassigned
netserialext3 16367 tcp Network Serial Extension Ports Three [Michael_J_Hoy] [Michael_J_Hoy]
netserialext3 16367 udp Network Serial Extension Ports Three [Michael_J_Hoy] [Michael_J_Hoy]
netserialext4 16368 tcp Network Serial Extension Ports Four [Michael_J_Hoy] [Michael_J_Hoy]
netserialext4 16368 udp Network Serial Extension Ports Four [Michael_J_Hoy] [Michael_J_Hoy]
16369-16383 Unassigned
18636-18667 Unassigned
DMExpress 32636 tcp DMExpress [Arnie_Farrelly] [Arnie_Farrelly]
DMExpress 32636 udp DMExpress [Arnie_Farrelly] [Arnie_Farrelly]

Contact Information

ID Name Organization Contact URI Last Updated
[Arnie_Farrelly] Arnie Farrelly mailto:afarrelly&syncsort.com
[De_Chih_Chien] De-Chih Chien mailto:de-chih_chien&symantec.com 2008-10-06
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[Jeff_Burke] Jeff Burke Regents of the University of California mailto:jburke&remap.ucla.edu 2013-10-30
[Michael_J_Hoy] Michael J Hoy mailto:mhoy&canberra-abq.com
[Pat_Richard] Pat Richard mailto:patr&xcert.com
[Peter_Morrison] Peter Morrison mailto:peter_morrison&sydney.sterling.com
[Ralph_Campbell] Ralph Campbell mailto:ralph.campbell&xasystems.com 2002-11
[Regents_of_the_University_of_California] Regents of the University of California mailto:jburke&remap.ucla.edu 2013-10-30
[Steven_Kelly] Steven Kelly mailto:stevek&metacase.com 2007-11-12