Service Name and Transport Protocol Port Number Registry

Last Updated
2021-10-12
Expert(s)
TCP/UDP: Joe Touch; Eliot Lear, Allison Mankin, Markku Kojo, Kumiko Ono, Martin Stiemerling, 
Lars Eggert, Alexey Melnikov, Wes Eddy, Alexander Zimmermann, Brian Trammell, and Jana Iyengar
SCTP: Allison Mankin and 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 difference uses of these ranges is 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.                                                   *
************************************************************************
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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
syslog-conn 601 tcp Reliable Syslog Service [RFC3195]
syslog-conn 601 udp Reliable Syslog Service [RFC3195]
aas 1601 tcp aas [Bob_Beard] [Bob_Beard]
aas 1601 udp aas [Bob_Beard] [Bob_Beard]
discp-client 2601 tcp discp client
discp-client 2601 udp discp client
visinet-gui 3601 tcp Visinet Gui [Jeff_Douglass] [Jeff_Douglass] 2002-09
visinet-gui 3601 udp Visinet Gui [Jeff_Douglass] [Jeff_Douglass] 2002-09
piranha2 4601 tcp Piranha2 [Primark_Corporation] [Primark_Corporation]
piranha2 4601 udp Piranha2 [Primark_Corporation] [Primark_Corporation]
esmagent 5601 tcp Enterprise Security Agent [Kimberly_Gibbs] [Kimberly_Gibbs]
esmagent 5601 udp Enterprise Security Agent [Kimberly_Gibbs] [Kimberly_Gibbs]
syslog-tls 6514 udp syslog over DTLS [RFC6012]
syslog-tls 6514 dccp syslog over DTLS [RFC6012]
mstmg-sstp 6601 tcp Microsoft Threat Management Gateway SSTP [Ori_Yosefi] [Ori_Yosefi] 2009-05-04
6601 udp Reserved
8601-8608 Unassigned
9601-9611 Unassigned
11601-11622 Unassigned
16004-16019 Unassigned
36525-36601 Unassigned
eftp 37601 tcp Epipole File Transfer Protocol [Epipole_Limited] [Colin_Buchanan] 2014-11-13
37601 udp Reserved
44601-44817 Unassigned

Contact Information

ID Name Organization Contact URI Last Updated
[Bob_Beard] Bob Beard mailto:bobb&lachman.com
[Colin_Buchanan] Colin Buchanan Epipole Limited mailto:colin&epipole.com 2014-11-13
[Epipole_Limited] Epipole Limited mailto:info&epipole.com 2014-11-13
[Jeff_Douglass] Jeff Douglass mailto:ist&att.net 2002-09
[Kimberly_Gibbs] Kimberly Gibbs mailto:kimgib&ccgate-ut.axent.com
[Ori_Yosefi] Ori Yosefi mailto:Ori.Yosefi&microsoft.com 2009-05-04
[Primark_Corporation] Primark Corporation mailto:joe.boone&primark.com