Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-04-30
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
ntp 123 tcp Network Time Protocol [Dave_Mills] [Dave_Mills] [RFC5905]
ntp 123 udp Network Time Protocol [Dave_Mills] [Dave_Mills] [RFC5905]
murray 1123 tcp Murray [Stu_Mark] [Stu_Mark]
murray 1123 udp Murray [Stu_Mark] [Stu_Mark]
periscope 1230 tcp Periscope [Kevin_Madden] [Kevin_Madden]
periscope 1230 udp Periscope [Kevin_Madden] [Kevin_Madden]
menandmice-lpm 1231 tcp menandmice-lpm [Sigfus_Magnusson] [Sigfus_Magnusson]
menandmice-lpm 1231 udp menandmice-lpm [Sigfus_Magnusson] [Sigfus_Magnusson]
first-defense 1232 tcp Remote systems monitoring [Nexum] [Michael_Fread] 2012-09-21 Microsoft (unoffically) using 1232
first-defense 1232 udp Remote systems monitoring [Nexum] [Michael_Fread] 2012-09-21 Microsoft (unoffically) using 1232
univ-appserver 1233 tcp Universal App Server [Tim_Sent] [Tim_Sent]
univ-appserver 1233 udp Universal App Server [Tim_Sent] [Tim_Sent]
search-agent 1234 tcp Infoseek Search Agent [Jackie_Wu] [Jackie_Wu]
search-agent 1234 udp Infoseek Search Agent [Jackie_Wu] [Jackie_Wu]
mosaicsyssvc1 1235 tcp mosaicsyssvc1 [Brian_Matthews] [Brian_Matthews]
mosaicsyssvc1 1235 udp mosaicsyssvc1 [Brian_Matthews] [Brian_Matthews]
bvcontrol 1236 tcp bvcontrol [Daniel_J_Walsh] [Daniel_J_Walsh]
bvcontrol 1236 udp bvcontrol [Daniel_J_Walsh] [Daniel_J_Walsh]
tsdos390 1237 tcp tsdos390 [Ben_Pracht] [Ben_Pracht]
tsdos390 1237 udp tsdos390 [Ben_Pracht] [Ben_Pracht]
hacl-qs 1238 tcp hacl-qs [Farid_Faez] [Farid_Faez]
hacl-qs 1238 udp hacl-qs [Farid_Faez] [Farid_Faez]
nmsd 1239 tcp NMSD [Yuri_Machkasov] [Yuri_Machkasov]
nmsd 1239 udp NMSD [Yuri_Machkasov] [Yuri_Machkasov]
gtp-control 2123 tcp GTP-Control Plane (3GPP) [Alessio_Casati] [Alessio_Casati]
gtp-control 2123 udp GTP-Control Plane (3GPP) [Alessio_Casati] [Alessio_Casati]
edix 3123 tcp EDI Translation Protocol [William_Randolph_Roy] [William_Randolph_Roy]
edix 3123 udp EDI Translation Protocol [William_Randolph_Roy] [William_Randolph_Roy]
z-wave 4123 tcp Z-Wave Protocol [Sigma_Designs_Inc_2] [Anders_Brandt][Mary_Miller] 2007-02 2012-11-08
z-wave 4123 udp Z-Wave Protocol [Sigma_Designs_Inc_2] [Anders_Brandt][Mary_Miller] 2007-02 2012-11-08
backup-express 6123 tcp Backup Express [Catalogic_Software_Inc] [Chi_Shih_Chang] 2008-03-19 2015-02-04
backup-express 6123 udp Backup Express [Catalogic_Software_Inc] [Chi_Shih_Chang] 2008-03-19 2015-02-04
snif 7123 tcp End-to-end TLS Relay Control Connection [VESvault_Corp] [Jim_Zubov] 2021-12-24
7123 udp Reserved
8123-8127 Unassigned
grcp 9123 tcp Global Relay compliant instant messaging protocol [Global_Relay] [Mike_Sample] 2012-11-28
9123 udp Reserved
11212-11234 Unassigned
xcompute 11235 tcp numerical systems messaging [Xplicit_Computing_Inc] [Graham_J_Orr] 2020-10-16
11235 udp Reserved
xcompute 11235 sctp numerical systems messaging [Xplicit_Computing_Inc] [Graham_J_Orr] 2020-10-16
11236-11318 Unassigned
linogridengine 12300 tcp LinoGrid Engine [Frans_Lundberg] [Frans_Lundberg] 2004-11
linogridengine 12300 udp LinoGrid Engine [Frans_Lundberg] [Frans_Lundberg] 2004-11
12301 Unassigned
rads 12302 tcp Remote Administration Daemon (RAD) is a system service that offers secure, remote, programmatic access to Solaris system configuration and run-time state [Oracle] [Devjani_Ray] 2012-04-20
12302 udp Reserved
12303-12320 Unassigned
warehouse-sss 12321 tcp Warehouse Monitoring Syst SSS [Craig_Steffen] [Craig_Steffen] 2005-08
warehouse-sss 12321 udp Warehouse Monitoring Syst SSS [Craig_Steffen] [Craig_Steffen] 2005-08
warehouse 12322 tcp Warehouse Monitoring Syst [Craig_Steffen] [Craig_Steffen] 2005-08
warehouse 12322 udp Warehouse Monitoring Syst [Craig_Steffen] [Craig_Steffen] 2005-08
12323-12344 Unassigned
italk 12345 tcp Italk Chat System [Takayuki_Ito] [Takayuki_Ito]
italk 12345 udp Italk Chat System [Takayuki_Ito] [Takayuki_Ito]
12346-12545 Unassigned
aurora-balaena 33123 tcp Aurora (Balaena Ltd) [Andrew_Mather] [Andrew_Mather] 2008-02-14
aurora-balaena 33123 udp Aurora (Balaena Ltd) [Andrew_Mather] [Andrew_Mather] 2008-02-14
z-wave-s 41230 tcp Z-Wave Protocol over SSL/TLS [Sigma_Designs_3] [Anders_Brandt_4] 2015-06-26
z-wave-s 41230 udp Z-Wave Protocol over DTLS [Sigma_Designs_3] [Anders_Brandt_4] 2015-06-26
41231-41793 Unassigned
z-wave-tunnel 44123 tcp Z-Wave Secure Tunnel [Sigma_Designs_Inc] [Anders_Brandt_3] 2012-10-12 2015-06-26
44123 udp Reserved

Contact Information

ID Name Organization Contact URI Last Updated
[Alessio_Casati] Alessio Casati mailto:a.casati&computer.org
[Anders_Brandt] Anders Brandt Sigma Designs, Inc. mailto:Anders_Brandt&sigmadesigns.com 2012-11-08
[Anders_Brandt_3] Anders Brandt Sigma Designs mailto:anders_brandt&sigmadesigns.com 2012-10-12
[Anders_Brandt_4] Anders Brandt Sigma Designs mailto:anders_brandt&sigmadesigns.com 2015-06-26
[Andrew_Mather] Andrew Mather mailto:info&balaena.com 2008-02-14
[Ben_Pracht] Ben Pracht mailto:ben.pracht&tivoli.com
[Brian_Matthews] Brian Matthews mailto:bmatthews&mosaicsystems.com
[Catalogic_Software_Inc] Catalogic Software, Inc. mailto:cchang&catalogicsoftware.com 2015-02-04
[Chi_Shih_Chang] Chi Shih Chang Catalogic Software, Inc. mailto:cchang&catalogicsoftware.com 2015-02-04
[Craig_Steffen] Craig Steffen mailto:csteffen&ncsa.uiuc.edu 2005-08
[Daniel_J_Walsh] Daniel J Walsh mailto:dwalsh&bindview.com
[Dave_Mills] Dave Mills mailto:mills&udel.edu 2022-06-03
[Devjani_Ray] Devjani Ray Oracle Corporation mailto:Devjani.Ray&oracle.com 2012-04-20
[Farid_Faez] Farid Faez mailto:farid_faez&hp.com
[Frans_Lundberg] Frans Lundberg mailto:frans&linova.com 2004-11
[Global_Relay] Global Relay Communications Inc mailto:Michael.Sample&GlobalRelay.net 2012-11-28
[Graham_J_Orr] Graham J. Orr mailto:graham&xplicitcomputing.com 2020-10-16
[Jackie_Wu] Jackie Wu mailto:jackiew&infoseek.com
[Jim_Zubov] Jim Zubov VESvault Corp mailto:jz&vesvault.com 2021-12-29
[Kevin_Madden] Kevin Madden mailto:Kevin&emailxtras.com
[Mary_Miller] Mary Miller Sigma Designs, Inc. mailto:Mary_Miller&sigmadesigns.com 2012-11-08
[Michael_Fread] Michael Fread Nexum, Inc. mailto:mfread&nexuminc.com 2012-09-21
[Mike_Sample] Mike Sample Global Relay Communications Inc mailto:Michael.Sample&GlobalRelay.net 2012-11-28
[Nexum] Nexum, Inc. mailto:mfread&nexuminc.com 2012-09-21
[Oracle] Oracle Corporation mailto:Devjani.Ray&oracle.com 2012-04-20
[Sigfus_Magnusson] Sigfus Magnusson mailto:sigfusm&menandmice.com
[Sigma_Designs_Inc] Sigma Designs, Inc. mailto:anders_brandt&sigmadesigns.com 2011-10-03
[Sigma_Designs_Inc_2] Sigma Designs, Inc. mailto:pr&sdesigns.com 2012-11-08
[Sigma_Designs_3] Sigma Designs mailto:anders_brandt&sigmadesigns.com 2015-06-26
[Stu_Mark] Stu Mark mailto:fordii&j51.com
[Takayuki_Ito] Takayuki Ito mailto:yuki&euc.jp
[Tim_Sent] Tim Sent mailto:tim.sent&systemsarchitects.com
[VESvault_Corp] VESvault Corp mailto:info&vesvault.com 2021-12-29
[William_Randolph_Roy] William Randolph Royere III mailto:william&royere.net
[Xplicit_Computing_Inc] Xplicit Computing Inc mailto:info&xplicitcomputing.com 2020-10-16
[Yuri_Machkasov] Yuri Machkasov mailto:yuri&ptc.com