Service Name and Transport Protocol Port Number Registry

Last Updated
2025-10-22
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
aol-2 5192 tcp AmericaOnline2 [Bruce_Mackey] [Bruce_Mackey]
aol-2 5192 udp AmericaOnline2 [Bruce_Mackey] [Bruce_Mackey]
aol-3 5193 tcp AmericaOnline3 [Bruce_Mackey] [Bruce_Mackey]
aol-3 5193 udp AmericaOnline3 [Bruce_Mackey] [Bruce_Mackey]
cpscomm 5194 tcp CipherPoint Config Service [CipherPoint] [CipherPoint] 2010-03-03
5194 udp Reserved
ampl-lic 5195 tcp The protocol is used by a license server and client programs to control use of program licenses that float to networked machines [AMPL_Optimization] [David_M_Gay] 2012-05-25
5195 udp Reserved
ampl-tableproxy 5196 tcp The protocol is used by two programs that exchange "table" data used in the AMPL modeling language [AMPL_Optimization] [David_M_Gay] 2012-05-25
5196 udp Reserved
tunstall-lwp 5197 tcp Tunstall Lone worker device interface [Tunstall_Healthcare_UK_Ltd] [Robert_Moore] 2014-12-10
5197 udp Reserved
5198-5199 Unassigned
5319 Unassigned
dj-ice 5419 tcp DJ-ICE [Don_Tyson_2] [Don_Tyson_2]
dj-ice 5419 udp DJ-ICE [Don_Tyson_2] [Don_Tyson_2]
5619-5626 Unassigned
dpm-agent 5719 tcp DPM Agent Coordinator [Sundar_Srinivasan][Vinay_Badami] [Sundar_Srinivasan][Vinay_Badami] 2006-05
dpm-agent 5719 udp DPM Agent Coordinator [Sundar_Srinivasan][Vinay_Badami] [Sundar_Srinivasan][Vinay_Badami] 2006-05
5815-5819 Unassigned
6119-6120 Unassigned
6164-6199 Unassigned
6319 Unassigned
svdrp 6419 tcp Simple VDR Protocol [Klaus_Schmidinger] [Klaus_Schmidinger] 2010-03-31
svdrp-disc 6419 udp Simple VDR Protocol Discovery [Klaus_Schmidinger] [Klaus_Schmidinger] 2015-05-08
odette-ftps 6619 tcp ODETTE-FTP over TLS/SSL [Ieuan_Friend] [Ieuan_Friend] 2006-03 [RFC5024]
odette-ftps 6619 udp ODETTE-FTP over TLS/SSL [Ieuan_Friend] [Ieuan_Friend] 2006-03 [RFC5024]
ircs-u 6697 tcp Internet Relay Chat via TLS/SSL 2014-02-11 [RFC7194]
doceri-ctl 7019 tcp doceri drawing service control [Paul_Brown] [Paul_Brown] 2011-04-27
doceri-view 7019 udp doceri drawing service screen view [Paul_Brown] [Paul_Brown] 2011-04-27
7182-7199 Unassigned
7412-7419 Unassigned
7709-7719 Unassigned
qbdb 8019 tcp QB DB Dynamic Port [Sridhar_Krishnamurth] [Sridhar_Krishnamurth] 2008-02-15
qbdb 8019 udp QB DB Dynamic Port [Sridhar_Krishnamurth] [Sridhar_Krishnamurth] 2008-02-15
8119-8120 Unassigned
gcp-rphy 8190 tcp Generic control plane for RPHY [CableLabs] [Karthik_Sundaresan] 2015-11-24
8190 udp Reserved
limnerpressure 8191 tcp Limner Pressure [Aaron_Kleinsteiber] [Aaron_Kleinsteiber] 2014-01-16
8191 udp Reserved
spytechphone 8192 tcp SpyTech Phone Service [Bill_Kay] [Bill_Kay] 2006-04
spytechphone 8192 udp SpyTech Phone Service [Bill_Kay] [Bill_Kay] 2006-04
8193 Unassigned
blp1 8194 tcp Bloomberg data API [Albert_Hou] [Albert_Hou] 2006-05
blp1 8194 udp Bloomberg data API [Albert_Hou] [Albert_Hou] 2006-05
blp2 8195 tcp Bloomberg feed [Albert_Hou] [Albert_Hou] 2006-05
blp2 8195 udp Bloomberg feed [Albert_Hou] [Albert_Hou] 2006-05
8196-8198 Unassigned
vvr-data 8199 tcp VVR DATA [Ming_Xu] [Ming_Xu]
vvr-data 8199 udp VVR DATA [Ming_Xu] [Ming_Xu]
8314-8319 Unassigned
9012-9019 Unassigned
mxit 9119 tcp MXit Instant Messaging [Marnus_Freeman] [Marnus_Freeman] 2006-02
mxit 9119 udp MXit Instant Messaging [Marnus_Freeman] [Marnus_Freeman] 2006-02
9165-9190 Unassigned
sun-as-jpda 9191 tcp Sun AppSvr JPDA [Abhijit_Kumar] [Abhijit_Kumar] 2005-11
sun-as-jpda 9191 udp Sun AppSvr JPDA [Abhijit_Kumar] [Abhijit_Kumar] 2005-11
9192-9199 Unassigned
9319-9320 Unassigned
9419-9442 Unassigned
9619-9627 Unassigned
10011-10019 Unassigned
10163-10199 Unassigned
imip 11319 tcp IMIP [Len_Zuvela] [Len_Zuvela]
imip 11319 udp IMIP [Len_Zuvela] [Len_Zuvela]
11624-11719 Unassigned Unauthorized Use Known on port 11711
11878-11966 Unassigned
sysinfo-sp 11967 tcp SysInfo Service Protocol [Mike_Cooper] [Mike_Cooper] 2003-03
sysinfo-sp 11967 udp SysInfo Service Protocol [Mike_Cooper] [Mike_Cooper] 2003-03
11968-11970 Unassigned
tibsd 11971 tcp TiBS Service [Teradactyl_LLC] [Kristen_Webb] 2019-05-17
11971 udp Reserved
11972-11996 Unassigned
wmereceiving 11997 sctp WorldMailExpress [Greg_Foutz] [Greg_Foutz] 2006-03
wmedistribution 11998 sctp WorldMailExpress [Greg_Foutz] [Greg_Foutz] 2006-03
wmereporting 11999 sctp WorldMailExpress [Greg_Foutz] [Greg_Foutz] 2006-03
13219-13222 Unassigned
13401-13719 Unassigned
dsmcc-session 13819 tcp DSMCC Session Messages [Tim_Addington] [Tim_Addington] [ISO/IEC 13818-6 MPEG-2 DSM-CC]
dsmcc-session 13819 udp DSMCC Session Messages [Tim_Addington] [Tim_Addington] [ISO/IEC 13818-6 MPEG-2 DSM-CC]
15119-15344 Unassigned
16004-16019 Unassigned
xoms 16619 tcp X509 Objects Management Service [Francis_GASCHET] [Francis_GASCHET] 2008-09-08
16619 udp Reserved
chipper 17219 tcp Chipper [Ronald_Jimmink] [Ronald_Jimmink]
chipper 17219 udp Chipper [Ronald_Jimmink] [Ronald_Jimmink]
igrid 19000 tcp iGrid Server [Massimo_Cafaro] [Massimo_Cafaro] 2004-11
igrid 19000 udp iGrid Server [Massimo_Cafaro] [Massimo_Cafaro] 2004-11
19001-19006 Unassigned
scintilla 19007 tcp Scintilla protocol for device services [Veejansh_Inc] [Chirag_Patel] 2014-03-04
scintilla 19007 udp Scintilla protocol for device services [Veejansh_Inc] [Chirag_Patel] 2014-03-04
19008-19019 Unassigned
j-link 19020 tcp J-Link TCP/IP Protocol [SEGGER] [SEGGER]
19020 udp Reserved
19021-19190 Unassigned
opsec-uaa 19191 tcp OPSEC UAA [Reuven_Harrison] [Reuven_Harrison]
opsec-uaa 19191 udp OPSEC UAA [Reuven_Harrison] [Reuven_Harrison]
19192-19193 Unassigned
ua-secureagent 19194 tcp UserAuthority SecureAgent [Reuven_Harrison_2] [Reuven_Harrison_2] 2003-01
ua-secureagent 19194 udp UserAuthority SecureAgent [Reuven_Harrison_2] [Reuven_Harrison_2] 2003-01
19195-19219 Unassigned

Contact Information

ID Name Organization Contact URI Last Updated
[Aaron_Kleinsteiber] Aaron Kleinsteiber mailto:protocol&limnerapp.com 2014-01-16
[Abhijit_Kumar] Abhijit Kumar mailto:as-iana-ports&sun.com 2005-11
[Albert_Hou] Albert Hou mailto:ahou1&bloomberg.com 2006-05
[AMPL_Optimization] AMPL Optimization, Inc. mailto:dmg&ampl.com 2012-05-25
[Bill_Kay] Bill Kay mailto:bkay&spy-tec.com 2006-04
[Bruce_Mackey] Bruce Mackey mailto:BAMackey&aol.com
[CableLabs] CableLabs mailto:info&cablelabs.com 2015-11-24
[Chirag_Patel] Chirag Patel Veejansh Inc mailto:cpatel&veejansh.com 2014-03-04
[CipherPoint] CipherPoint Software, inc. mailto:wshea&cipherpointsoftware.com 2010-03-03
[David_M_Gay] David M. Gay AMPL Optimization, Inc. mailto:dmg&ampl.com 2012-05-25
[Don_Tyson_2] Don Tyson mailto:don.tyson&cor.dowjones.com
[Francis_GASCHET] Francis GASCHET NUMLOG mailto:fg&numlog.fr 2008-09-08
[Greg_Foutz] Greg Foutz mailto:gregf&adminovation.com 2006-03
[Ieuan_Friend] Ieuan Friend mailto:ieuan.friend&dip.co.uk 2006-03
[Karthik_Sundaresan] Karthik Sundaresan mailto:k.sundaresan&cablelabs.com 2015-11-24
[Klaus_Schmidinger] Klaus Schmidinger mailto:Klaus.Schmidinger&tvdr.de 2010-03-31
[Kristen_Webb] Kristen Webb mailto:kwebb&teradactyl.com 2019-05-17
[Len_Zuvela] Len Zuvela IM Unified Coalition mailto:imu-comments&egroups.com
[Marnus_Freeman] Marnus Freeman mailto:marnus&swistgroup.com 2006-02
[Massimo_Cafaro] Massimo Cafaro mailto:massimo.cafaro&unile.it 2004-11
[Mike_Cooper] Mike Cooper mailto:mcooper&magnicomp.com 2003-03
[Ming_Xu] Ming Xu mailto:ming&veritas.com
[Paul_Brown] Paul Brown mailto:pbrown&spcontrols.com 2011-04-27
[Reuven_Harrison] Reuven Harrison mailto:rnd_ana&checkpoint.com
[Reuven_Harrison_2] Reuven Harrison mailto:rharrison&checkpoint.com 2003-01
[Robert_Moore] Robert Moore Tunstall Healthcare (UK) Ltd. mailto:robert.moore&tunstall.com 2014-12-10
[Ronald_Jimmink] Ronald Jimmink mailto:Ronald.Jimmink&chipper.nl
[SEGGER] SEGGER Microcontroller GmbH & Co. KG mailto:info&segger.com 2009-01-16
[Sridhar_Krishnamurth] Sridhar Krishnamurthy mailto:Sridhar_Krishnamurthy&intuit.com 2008-02-15
[Sundar_Srinivasan] Sundar Srinivasan mailto:sundars&microsoft.com 2006-05
[Teradactyl_LLC] Teradactyl LLC mailto:vendors&teradactyl.com 2019-05-17
[Tim_Addington] Tim Addington mailto:Tim.Addington&sciatl.com
[Tunstall_Healthcare_UK_Ltd] Tunstall Healthcare (UK) Ltd. mailto:robert.moore&tunstall.com 2014-12-10
[Veejansh_Inc] Veejansh Inc mailto:admin&veejansh.com 2014-03-04
[Vinay_Badami] Vinay Badami mailto:VinayB&microsoft.com 2006-05