Service Name and Transport Protocol Port Number Registry

Last Updated

2025-03-11

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]

Available Formats

CSV
XML
HTML
Plain text

Service Name	Port Number	Transport Protocol	Description	Assignee	Contact	Registration Date	Modification Date	Reference	Service Code	Unauthorized Use Reported	Assignment Notes
	5172	udp	Reserved
	5173-5189		Unassigned
aol	5190	tcp	America-Online	[Marty_Lyons]	[Marty_Lyons]
aol	5190	udp	America-Online	[Marty_Lyons]	[Marty_Lyons]
aol-1	5191	tcp	AmericaOnline1	[Bruce_Mackey]	[Bruce_Mackey]
aol-1	5191	udp	AmericaOnline1	[Bruce_Mackey]	[Bruce_Mackey]
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
targus-getdata1	5201	tcp	TARGUS GetData 1	[John_Keaveney]	[John_Keaveney]
targus-getdata1	5201	udp	TARGUS GetData 1	[John_Keaveney]	[John_Keaveney]
	5210-5214		Unassigned
noteza	5215	tcp	NOTEZA Data Safety Service	[CNS_a.s.]	[Pavel_Mendl_2]	2014-06-12
	5215	udp	Reserved
noteza	5215	sctp	NOTEZA Data Safety Service	[CNS_a.s.]	[Pavel_Mendl_2]	2014-06-12
	5216-5220		Unassigned
3exmp	5221	tcp	3eTI Extensible Management Protocol for OAMP	[Bill_Rettig]	[Bill_Rettig]	2010-05-19
	5221	udp	Reserved
xmpp-client	5222	tcp	XMPP Client Connection					[RFC6120]
crusecontrol	5231	tcp	Remote Control of Scan Software for Cruse Scanners	[Cruse_Spezialmaschinen_GmbH]	[Christof_J._Reetz_2]	2014-08-15
	5231	udp	Reserved
	5238-5241		Unassigned
capwap-control	5246	udp	CAPWAP Control Protocol					[RFC5415]
capwap-data	5247	udp	CAPWAP Data Protocol					[RFC5415]
caevms	5251	tcp	CA eTrust VM Service	[Kevin_Bond]	[Kevin_Bond]	2004-11
caevms	5251	udp	CA eTrust VM Service	[Kevin_Bond]	[Kevin_Bond]	2004-11
3com-njack-1	5264	tcp	3Com Network Jack Port 1	[Abhay_Rajaram]	[Abhay_Rajaram]	2003-03
3com-njack-1	5264	udp	3Com Network Jack Port 1	[Abhay_Rajaram]	[Abhay_Rajaram]	2003-03
xmpp-server	5269	tcp	XMPP Server Connection					[RFC6120]
cuelink	5271	tcp	StageSoft CueLink messaging	[Todd_Pichler]	[Todd_Pichler]	2010-03-26
cuelink-disc	5271	udp	StageSoft CueLink discovery	[Todd_Pichler]	[Todd_Pichler]	2010-03-26
undo-lm	5281	tcp	Undo License Manager	[Undo_Ltd]	[Edward_Moffett]	2010-04-19	2019-01-25
	5281	udp	Reserved
hacl-gs	5301	tcp	HA cluster general services	[Eric_Soderberg_2][Edward_Yim]	[Eric_Soderberg_2][Edward_Yim]
hacl-gs	5301	udp	HA cluster general services	[Eric_Soderberg_2][Edward_Yim]	[Eric_Soderberg_2][Edward_Yim]
outlaws	5310	tcp	Outlaws	[Richard_Fife]	[Richard_Fife]
outlaws	5310	udp	Outlaws	[Richard_Fife]	[Richard_Fife]
	5311		Unassigned			2004-05-07
permabit-cs	5312	tcp	Permabit Client-Server	[Jered_Floyd]	[Jered_Floyd]	2004-06
permabit-cs	5312	udp	Permabit Client-Server	[Jered_Floyd]	[Jered_Floyd]	2004-06
rrdp	5313	tcp	Real-time & Reliable Data	[Ted_Hoshi]	[Ted_Hoshi]	2004-06
rrdp	5313	udp	Real-time & Reliable Data	[Ted_Hoshi]	[Ted_Hoshi]	2004-06
opalis-rbt-ipc	5314	tcp	opalis-rbt-ipc	[Laurent_Domenech]	[Laurent_Domenech]
opalis-rbt-ipc	5314	udp	opalis-rbt-ipc	[Laurent_Domenech]	[Laurent_Domenech]
hacl-poll	5315	tcp	HA Cluster UDP Polling	[Hoa_Nguyen]	[Hoa_Nguyen]
hacl-poll	5315	udp	HA Cluster UDP Polling	[Hoa_Nguyen]	[Hoa_Nguyen]
hpbladems	5316	tcp	HPBladeSystem Monitor Service	[Alan_Minchew]	[Alan_Minchew]	2011-05-23	2011-05-16
	5316	udp	Unassigned			2011-05-16
hpdevms	5317	tcp	HP Device Monitor Service	[Alan_Minchew]	[Alan_Minchew]	2011-05-16
	5317	udp	Reserved
pkix-cmc	5318	tcp	PKIX Certificate Management using CMS (CMC)	[IESG]	[IETF_Chair]			[RFC6402]
	5318	udp	Reserved
	5319		Unassigned
bsfsvr-zn-ssl	5321	tcp	Webservices-based Zn interface of BSF over SSL	[Bert_Paul]	[Bert_Paul]	2008-07-03
	5321	udp	Reserved
	5351	tcp	Reserved
pcp	5351	udp	Port Control Protocol	[IESG]	[IETF_Chair]			[RFC6887]
ms-s-sideshow	5361	tcp	Secure Protocol for Windows SideShow	[Dan_Polivy]	[Dan_Polivy]	2008-03-12
ms-s-sideshow	5361	udp	Secure Protocol for Windows SideShow	[Dan_Polivy]	[Dan_Polivy]	2008-03-12
excerpts	5401	tcp	Excerpt Search Secure	[John_Hinsdale]	[John_Hinsdale]
excerpts	5401	udp	Excerpt Search Secure	[John_Hinsdale]	[John_Hinsdale]
salient-usrmgr	5410	tcp	Salient User Manager	[Richard_Farnham]	[Richard_Farnham]
salient-usrmgr	5410	udp	Salient User Manager	[Richard_Farnham]	[Richard_Farnham]
actnet	5411	tcp	ActNet	[Simon_Robillard]	[Simon_Robillard]
actnet	5411	udp	ActNet	[Simon_Robillard]	[Simon_Robillard]
continuus	5412	tcp	Continuus	[Steven_Holtsberg]	[Steven_Holtsberg]
continuus	5412	udp	Continuus	[Steven_Holtsberg]	[Steven_Holtsberg]
wwiotalk	5413	tcp	WWIOTALK	[Roger_Knobbe]	[Roger_Knobbe]
wwiotalk	5413	udp	WWIOTALK	[Roger_Knobbe]	[Roger_Knobbe]
statusd	5414	tcp	StatusD	[Stephen_Misel_2]	[Stephen_Misel_2]
statusd	5414	udp	StatusD	[Stephen_Misel_2]	[Stephen_Misel_2]
ns-server	5415	tcp	NS Server	[Jeffrey_Chiao]	[Jeffrey_Chiao]
ns-server	5415	udp	NS Server	[Jeffrey_Chiao]	[Jeffrey_Chiao]
sns-gateway	5416	tcp	SNS Gateway	[Mary_Holstage]	[Mary_Holstage]
sns-gateway	5416	udp	SNS Gateway	[Mary_Holstage]	[Mary_Holstage]
sns-agent	5417	tcp	SNS Agent	[Mary_Holstage]	[Mary_Holstage]
sns-agent	5417	udp	SNS Agent	[Mary_Holstage]	[Mary_Holstage]
mcntp	5418	tcp	MCNTP	[Heiko_Rupp]	[Heiko_Rupp]
mcntp	5418	udp	MCNTP	[Heiko_Rupp]	[Heiko_Rupp]
dj-ice	5419	tcp	DJ-ICE	[Don_Tyson_2]	[Don_Tyson_2]
dj-ice	5419	udp	DJ-ICE	[Don_Tyson_2]	[Don_Tyson_2]
netsupport2	5421	tcp	Net Support 2	[Paul_Sanders]	[Paul_Sanders]
netsupport2	5421	udp	Net Support 2	[Paul_Sanders]	[Paul_Sanders]
park-agent	5431	tcp	PARK AGENT	[John_Clifford]	[John_Clifford]
park-agent	5431	udp	PARK AGENT	[John_Clifford]	[John_Clifford]
	5451-5452		Unassigned
silkmeter	5461	tcp	SILKMETER	[Klaus_Fellner]	[Klaus_Fellner]
silkmeter	5461	udp	SILKMETER	[Klaus_Fellner]	[Klaus_Fellner]
apsolab-cols	5471	tcp	The Apsolab company's secure data collection protocol (native api)	[Apsolab_Inc]	[Jean-Francois_Gauthier]	2014-11-10
	5471	udp	Reserved
fcp-addr-srvr1	5500	tcp	fcp-addr-srvr1	[Ken_Wittmer]	[Ken_Wittmer]

Contact Information

ID	Name	Organization	Contact URI	Last Updated
[Abhay_Rajaram]	Abhay Rajaram		mailto:Abhay_Rajaram&3com.com	2003-03
[Alan_Minchew]	Alan Minchew		mailto:alan.minchew&hp.com	2011-05-23
[AMPL_Optimization]		AMPL Optimization, Inc.	mailto:dmg&ampl.com	2012-05-25
[Apsolab_Inc]		Apsolab Inc.	mailto:admin&apsolab.com	2014-11-10
[Bert_Paul]	Bert Paul		mailto:bert.paul&apertio.com	2008-07-03
[Bill_Rettig]	Bill Rettig		mailto:WRettig&efji.com	2010-05-19
[Bruce_Mackey]	Bruce Mackey		mailto:BAMackey&aol.com
[Christof_J._Reetz_2]	Christof J. Reetz	Cruse Spezialmaschinen GmbH	mailto:cjr&crusescanner.com	2014-08-15
[CipherPoint]		CipherPoint Software, inc.	mailto:wshea&cipherpointsoftware.com	2010-03-03
[CNS_a.s.]		CNS a.s. (IT company registered in Czech republic)	mailto:HAJN.L&cns.cz	2014-06-12
[Cruse_Spezialmaschinen_GmbH]		Cruse Spezialmaschinen GmbH	mailto:cjr&crusescanner.com	2014-08-15
[Dan_Polivy]	Dan Polivy		mailto:dpolivy&microsoft.com	2008-03-12
[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
[Edward_Moffett]	Edward Moffett	Undo Ltd	mailto:office.manager&undo.io	2019-01-25
[Edward_Yim]	Edward Yim		mailto:eyim&hpmfas4.cup.hp.com
[Eric_Soderberg_2]	Eric Soderberg		mailto:seric&hposl102.cup.hp
[Heiko_Rupp]	Heiko Rupp		mailto:hwr&pilhuhn.de
[Hoa_Nguyen]	Hoa Nguyen		mailto:hoan&cup.hp.com
[IESG]		IESG	mailto:iesg&ietf.org
[IETF_Chair]	IETF Chair	IETF	mailto:chair&ietf.org
[Jean-Francois_Gauthier]	Jean-Francois Gauthier	Apsolab Inc.	mailto:jfgauthier&apsolab.com	2014-11-10
[Jeffrey_Chiao]	Jeffrey Chiao		mailto:chiaoj&netsoft.com
[Jered_Floyd]	Jered Floyd		mailto:jered&permabit.com	2004-06
[John_Clifford]	John Clifford		mailto:John.Clifford&veritas.com
[John_Hinsdale]	John Hinsdale		mailto:hin&alma.com
[John_Keaveney]	John Keaveney		mailto:johnkeaveney&targusinfo.com
[Ken_Wittmer]	Ken Wittmer		mailto:kenneth.m.wittmer&accenture.com
[Kevin_Bond]	Kevin Bond		mailto:kevin.bond&ca.com	2004-11
[Klaus_Fellner]	Klaus Fellner		mailto:webmaster&segue.com mailto:kfellner&segue.com
[Laurent_Domenech]	Laurent Domenech	Opalis	mailto:ldomenech&opalis.com
[Marty_Lyons]	Marty Lyons		mailto:marty&aol.com
[Mary_Holstage]	Mary Holstage		mailto:holstege&firstfloor.com
[Paul_Sanders]	Paul Sanders		mailto:p.sanders&dial.pipex.com
[Pavel_Mendl_2]	Pavel Mendl	CNS a.s. (IT company registered in Czech republic)	mailto:Pavel.MENDL&cns.cz	2014-06-12
[Richard_Farnham]	Richard Farnham		mailto:rfarnham&salient.com
[Richard_Fife]	Richard Fife		mailto:richardf&lucasarts.com
[Robert_Moore]	Robert Moore	Tunstall Healthcare (UK) Ltd.	mailto:robert.moore&tunstall.com	2014-12-10
[Roger_Knobbe]	Roger Knobbe		mailto:RogerK&wonderware.com
[Simon_Robillard]	Simon Robillard		mailto:RobillardS&actresearch.com
[Stephen_Misel_2]	Stephen Misel		mailto:steve&satelnet.org
[Steven_Holtsberg]	Steven Holtsberg		mailto:steveh&continuus.com
[Ted_Hoshi]	Ted Hoshi		mailto:tetsuo.hoshi&jp.yokogawa.com	2004-06
[Todd_Pichler]	Todd Pichler		mailto:todd.pichler&stagesoft.com	2010-03-26
[Tunstall_Healthcare_UK_Ltd]		Tunstall Healthcare (UK) Ltd.	mailto:robert.moore&tunstall.com	2014-12-10
[Undo_Ltd]		Undo Ltd	mailto:office.manager&undo.io	2019-01-25