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
onehome-help 2199 udp OneHome Service Port [Jim_Herman] [Jim_Herman] 2005-08
2200 tcp Reserved This entry has been removed on 2019-07-05.
2200 udp Reserved This entry has been removed on 2019-07-05.
netiq-ncap 2219 tcp NetIQ NCAP Protocol [Roger_Huebner] [Roger_Huebner] 2010-08-25
netiq-ncap 2219 udp NetIQ NCAP Protocol [Roger_Huebner] [Roger_Huebner] 2010-08-25
infolibria 2319 tcp InfoLibria [Chris_Chiotasso] [Chris_Chiotasso]
infolibria 2319 udp InfoLibria [Chris_Chiotasso] [Chris_Chiotasso]
attachmate-s2s 2419 tcp Attachmate S2S [Chris_Rominski] [Chris_Rominski]
attachmate-s2s 2419 udp Attachmate S2S [Chris_Rominski] [Chris_Rominski]
globmsgsvc 2519 tcp globmsgsvc [David_Wiltz] [David_Wiltz]
globmsgsvc 2519 udp globmsgsvc [David_Wiltz] [David_Wiltz]
bruce 2619 tcp bruce [Alec_Muffett] [Alec_Muffett]
bruce 2619 udp bruce [Alec_Muffett] [Alec_Muffett]
scan-change 2719 tcp Scan & Change [Alexander_Raji] [Alexander_Raji]
scan-change 2719 udp Scan & Change [Alexander_Raji] [Alexander_Raji]
fc-faultnotify 2819 tcp FC Fault Notification [Dave_Watkins] [Dave_Watkins]
fc-faultnotify 2819 udp FC Fault Notification [Dave_Watkins] [Dave_Watkins]
roboer 2919 tcp roboER [Paul_Snook] [Paul_Snook]
roboer 2919 udp roboER [Paul_Snook] [Paul_Snook]
resource-mgr 3019 tcp Resource Manager

IANA assigned this well-formed service name as a replacement for "resource_mgr".
[Gary_Glover] [Gary_Glover]
resource_mgr 3019 tcp Resource Manager [Gary_Glover] [Gary_Glover] This entry is an alias to "resource-mgr". This entry is now historic, not usable for use with many common service discovery mechanisms.
resource-mgr 3019 udp Resource Manager

IANA assigned this well-formed service name as a replacement for "resource_mgr".
[Gary_Glover] [Gary_Glover]
resource_mgr 3019 udp Resource Manager [Gary_Glover] [Gary_Glover] This entry is an alias to "resource-mgr". This entry is now historic, not usable for use with many common service discovery mechanisms.
itu-bicc-stc 3097 sctp ITU-T Q.1902.1/Q.2150.3 [Greg_Sidebottom] [Greg_Sidebottom]
d2000kernel 3119 tcp D2000 Kernel Port
d2000kernel 3119 udp D2000 Kernel Port
csvr-proxy 3190 tcp ConServR Proxy
csvr-proxy 3190 udp ConServR Proxy
csvr-sslproxy 3191 tcp ConServR SSL Proxy [Mikhail_Kruk] [Mikhail_Kruk]
csvr-sslproxy 3191 udp ConServR SSL Proxy [Mikhail_Kruk] [Mikhail_Kruk]
firemonrcc 3192 tcp FireMon Revision Control [Michael_Bishop] [Michael_Bishop]
firemonrcc 3192 udp FireMon Revision Control [Michael_Bishop] [Michael_Bishop]
spandataport 3193 tcp SpanDataPort [Jesse_McKay] [Jesse_McKay]
spandataport 3193 udp SpanDataPort [Jesse_McKay] [Jesse_McKay]
magbind 3194 tcp Rockstorm MAG protocol [Jens_Nilsson] [Jens_Nilsson]
magbind 3194 udp Rockstorm MAG protocol [Jens_Nilsson] [Jens_Nilsson]
ncu-1 3195 tcp Network Control Unit
ncu-1 3195 udp Network Control Unit
ncu-2 3196 tcp Network Control Unit [Charlie_Hundre] [Charlie_Hundre]
ncu-2 3196 udp Network Control Unit [Charlie_Hundre] [Charlie_Hundre]
embrace-dp-s 3197 tcp Embrace Device Protocol Server
embrace-dp-s 3197 udp Embrace Device Protocol Server
embrace-dp-c 3198 tcp Embrace Device Protocol Client [Elliot_Schwartz] [Elliot_Schwartz]
embrace-dp-c 3198 udp Embrace Device Protocol Client [Elliot_Schwartz] [Elliot_Schwartz]
dmod-workspace 3199 tcp DMOD WorkSpace [Nick_Plante] [Nick_Plante]
dmod-workspace 3199 udp DMOD WorkSpace [Nick_Plante] [Nick_Plante]
wms-messenger 3219 tcp WMS Messenger [WM_Software_Inc.] [WM_Software_Inc.] 2022-07-18
wms-messenger 3219 udp WMS Messenger [WM_Software_Inc.] [WM_Software_Inc.] 2022-07-18
sdt-lmd 3319 tcp SDT License Manager [Salvo_Nassisi] [Salvo_Nassisi]
sdt-lmd 3319 udp SDT License Manager [Salvo_Nassisi] [Salvo_Nassisi]
softaudit 3419 tcp Isogon SoftAudit [Per_Hellberg] [Per_Hellberg] 2002-02
softaudit 3419 udp ISogon SoftAudit [Per_Hellberg] [Per_Hellberg] 2002-02
nvmsgd 3519 tcp Netvion Messenger Port
galileo 3519 udp Netvion Galileo Port
aairnet-2 3619 tcp AAIR-Network 2 [James_Mealey] [James_Mealey] 2002-10
aairnet-2 3619 udp AAIR-Network 2 [James_Mealey] [James_Mealey] 2002-10
itelserverport 3719 tcp iTel Server Port [Mark_Hendricks] [Mark_Hendricks] 2003-03
itelserverport 3719 udp iTel Server Port [Mark_Hendricks] [Mark_Hendricks] 2003-03
sitewatch-s 3766 tcp SSL e-watch sitewatch server [e-Watch_Corporation] [John_M_Baird_2] 2014-05-13 this port was previously updated on 2009-06-19
3766 udp Reserved this port was previously updated on 2009-06-19
epl-slp 3819 tcp EPL Sequ Layer Protocol [Hans_Weibel] [Hans_Weibel] 2004-10
epl-slp 3819 udp EPL Sequ Layer Protocol [Hans_Weibel] [Hans_Weibel] 2004-10
hyperip 3919 tcp HyperIP [Network_Executive_Software_Inc] [Nancy_Golio] 2003-11 2017-01-25
hyperip 3919 udp HyperIP [Network_Executive_Software_Inc] [Nancy_Golio] 2003-11 2017-01-25
talarian-mcast5 4019 tcp Talarian Mcast [Geoff_Mendal] [Geoff_Mendal]
talarian-mcast5 4019 udp Talarian Mcast [Geoff_Mendal] [Geoff_Mendal]
assuria-slm 4119 tcp Assuria Log Manager [Nick_Connor] [Nick_Connor] 2006-12
assuria-slm 4119 udp Assuria Log Manager [Nick_Connor] [Nick_Connor] 2006-12
sieve 4190 tcp ManageSieve Protocol
4190 udp Reserved [RFC5804]
4191 tcp Reserved
dsmipv6 4191 udp Dual Stack MIPv6 NAT Traversal [RFC5555]
azeti 4192 tcp Azeti Agent Service [Uwe_Holz] [Uwe_Holz] 2009-11-09
azeti-bd 4192 udp azeti blinddate [Michael_Werski] [Michael_Werski] 2010-02-18
pvxplusio 4193 tcp PxPlus remote file srvr [Mike_King] [Mike_King] 2009-11-09
4193 udp Reserved
spdm 4194 tcp Security Protocol and Data Model [DMTF_Administration] [Robert_Keyes] 2022-01-10 2025-05-30
4194 udp Reserved
aws-wsp 4195 tcp AWS protocol for cloud remoting solution [Amazon.com_Services_LLC] [Lauren_Townsend] 2020-04-06
aws-wsp 4195 udp AWS protocol for cloud remoting solution [Amazon.com_Services_LLC] [Lauren_Townsend] 2020-04-06
aws-wsp 4195 sctp AWS protocol for cloud remoting solution [Amazon.com_Services_LLC] [Lauren_Townsend] 2020-04-06
aws-wsp 4195 dccp AWS protocol for cloud remoting solution [Amazon.com_Services_LLC] [Lauren_Townsend] 2020-04-06
4196 Unassigned
hctl 4197 tcp Harman HControl Protocol [Harman_International_Industries_Inc] [Darin_Smith] 2017-02-16
hctl 4197 udp Harman HControl Protocol [Harman_International_Industries_Inc] [Darin_Smith] 2017-02-16
4198 Unassigned
eims-admin 4199 tcp EIMS ADMIN [Glenn_Anderson] [Glenn_Anderson]
eims-admin 4199 udp EIMS ADMIN [Glenn_Anderson] [Glenn_Anderson]
fox-skytale 4319 tcp Fox SkyTale encrypted communication [Fox_Crypto_BV] [Mark_Revier] 2022-01-20 2024-04-29
fox-skytale 4319 udp Fox SkyTale encrypted communication [Fox_Crypto_BV] [Mark_Revier] 2022-01-20 2024-04-29
cbp 4419 tcp Colnod Binary Protocol [Colsys_s.r.o.] [Jiri_Merth] 2016-03-23
4419 udp Reserved
dtn-bundle 4556 dccp DTN Bundle DCCP CL Protocol 2013-11-12 2014-02-21 [RFC7122] 1685351985
5016-5019 Unassigned
5118-5119 Unassigned
5153 tcp Reserved 2009-07-01 2018-04-19 Historic usage was toruxserver. De-Assigned on 2018-04-19
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]

Contact Information

ID Name Organization Contact URI Last Updated
[Alec_Muffett] Alec Muffett mailto:alecm&sun.com
[Alexander_Raji] Alexander Raji mailto:araji&lucent.com
[Amazon.com_Services_LLC] Amazon.com Services LLC mailto:aws-iana&amazon.com 2022-11-07
[Bruce_Mackey] Bruce Mackey mailto:BAMackey&aol.com
[Charlie_Hundre] Charlie Hundre mailto:charlie&rdsrv.reco.com.tw
[Chris_Chiotasso] Chris Chiotasso mailto:cchiotasso&infolibria.com
[Chris_Rominski] Chris Rominski mailto:ChrisRom&attachmate.com
[Colsys_s.r.o.] Colsys s.r.o. mailto:jiri.merth&colsys.cz 2016-03-23
[Darin_Smith] Darin Smith mailto:darin.smith&harman.com 2017-02-16
[Dave_Watkins] Dave Watkins mailto:davew&boi.hp.com
[David_Wiltz] David Wiltz mailto:dwiltz&hf.intel.com
[DMTF_Administration] DMTF Administration mailto:admin&dmtf.org 2025-05-30
[e-Watch_Corporation] e-Watch Corporation mailto:jbaird&e-watch.com 2014-05-13
[Elliot_Schwartz] Elliot Schwartz mailto:elliot&mit.edu
[Fox_Crypto_BV] Fox Crypto B.V. mailto:iana&foxcrypto.com 2024-04-29
[Gary_Glover] Gary Glover mailto:gglover&novell.com
[Geoff_Mendal] Geoff Mendal mailto:mendal&talarian.com
[Glenn_Anderson] Glenn Anderson mailto:glenn&qualcomm.co.nz
[Greg_Sidebottom] Greg Sidebottom mailto:gregside&home.com
[Hans_Weibel] Hans Weibel mailto:hans.weibel&zhwin.ch 2004-10
[Harman_International_Industries_Inc] Harman International Industries Inc. mailto:darin.smith&harman.com 2017-02-16
[James_Mealey] James Mealey mailto:jymealey&yahoo.com 2002-10
[Jens_Nilsson] Jens Nilsson mailto:jens&rockstorm.se
[Jesse_McKay] Jesse McKay mailto:jesse&spandata.com
[Jim_Herman] Jim Herman mailto:jherman&homelogic.com 2005-08
[Jiri_Merth] Jiri Merth mailto:jiri.merth&colsys.cz 2016-03-23
[John_M_Baird_2] John M Baird e-Watch Corporation mailto:jbaird&e-watch.com 2014-05-13
[Lauren_Townsend] Lauren Townsend Amazon.com Services LLC mailto:townslau&amazon.com 2020-04-06
[Mark_Hendricks] Mark Hendricks mailto:markah&copper.net 2003-03
[Mark_Revier] Mark Revier Fox Crypto B.V. mailto:iana&foxcrypto.com 2024-04-29
[Marty_Lyons] Marty Lyons mailto:marty&aol.com
[Michael_Bishop] Michael Bishop mailto:mbishop&fishnetsecurity.com
[Michael_Werski] Michael Werski mailto:michael.werski&azeti.net 2010-02-18
[Mike_King] Mike King mailto:mike.king&pvxplus.com 2009-11-09
[Mikhail_Kruk] Mikhail Kruk mailto:mkruk&biscom.com
[Nancy_Golio] Nancy Golio mailto:nancy.golio&netex.com 2017-01-25
[Network_Executive_Software_Inc] Network Executive Software, Inc. mailto:support&netex.com 2017-01-25
[Nick_Connor] Nick Connor mailto:nickc&assuria.com 2010-06-30
[Nick_Plante] Nick Plante mailto:nplante&dmod.com
[Paul_Snook] Paul Snook mailto:paul.snook&itheon.com
[Per_Hellberg] Per Hellberg mailto:phellberg&isogon.com 2002-02
[Robert_Keyes] Robert Keyes mailto:robert&woldconsulting.com 2025-05-30
[Roger_Huebner] Roger Huebner mailto:iana-ports&netiq.com 2010-08-25
[Salvo_Nassisi] Salvo Nassisi mailto:sdtech&tin.it
[Uwe_Holz] Uwe Holz mailto:uwe.holz&azeti.net 2009-11-09
[WM_Software_Inc.] WM Software Inc. mailto:support&wmsoftware.com 2022-07-18