Internet Assigned Numbers Authority

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]

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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
drmsmc 1878 udp drmsmc [Katsuhiko_Abe] [Katsuhiko_Abe]
nettgain-nms 1879 tcp NettGain NMS [Dr_Yair_Shapira] [Dr_Yair_Shapira]
nettgain-nms 1879 udp NettGain NMS [Dr_Yair_Shapira] [Dr_Yair_Shapira]
vsat-control 1880 tcp Gilat VSAT Control [Yariv_Kaplan] [Yariv_Kaplan]
vsat-control 1880 udp Gilat VSAT Control [Yariv_Kaplan] [Yariv_Kaplan]
ibm-mqseries2 1881 tcp IBM WebSphere MQ Everyplace [Jane_Porter] [Jane_Porter]
ibm-mqseries2 1881 udp IBM WebSphere MQ Everyplace [Jane_Porter] [Jane_Porter]
ecsqdmn 1882 tcp CA eTrust Common Services [Paul_Wissmiller] [Paul_Wissmiller]
ecsqdmn 1882 udp CA eTrust Common Services [Paul_Wissmiller] [Paul_Wissmiller]
mqtt 1883 tcp Message Queuing Telemetry Transport Protocol [OASIS] [Robin_Cover] 2015-02-10
mqtt 1883 udp Message Queuing Telemetry Transport Protocol [OASIS] [Robin_Cover] 2015-02-10
idmaps 1884 tcp Internet Distance Map Svc [Sugih_Jamim] [Sugih_Jamim]
idmaps 1884 udp Internet Distance Map Svc [Sugih_Jamim] [Sugih_Jamim]
vrtstrapserver 1885 tcp Veritas Trap Server [Russell_Thrasher] [Russell_Thrasher]
vrtstrapserver 1885 udp Veritas Trap Server [Russell_Thrasher] [Russell_Thrasher]
leoip 1886 tcp Leonardo over IP [Dietmar_Finkler] [Dietmar_Finkler]
leoip 1886 udp Leonardo over IP [Dietmar_Finkler] [Dietmar_Finkler]
filex-lport 1887 tcp FileX Listening Port [Megan_Woods] [Megan_Woods]
filex-lport 1887 udp FileX Listening Port [Megan_Woods] [Megan_Woods]
ncconfig 1888 tcp NC Config Port [Simon_Parker] [Simon_Parker]
ncconfig 1888 udp NC Config Port [Simon_Parker] [Simon_Parker]
unify-adapter 1889 tcp Unify Web Adapter Service [Daegis_Inc] [Chris_Anderson] 2012-07-31
unify-adapter 1889 udp Unify Web Adapter Service [Daegis_Inc] [Chris_Anderson] 2012-07-31
wilkenlistener 1890 tcp wilkenListener [Wilken_GmbH] [Wilken_GmbH]
wilkenlistener 1890 udp wilkenListener [Wilken_GmbH] [Wilken_GmbH]
childkey-notif 1891 tcp ChildKey Notification
childkey-notif 1891 udp ChildKey Notification
childkey-ctrl 1892 tcp ChildKey Control [Ivan_Berardinelli] [Ivan_Berardinelli]
childkey-ctrl 1892 udp ChildKey Control [Ivan_Berardinelli] [Ivan_Berardinelli]
elad 1893 tcp ELAD Protocol [Franco_Milan] [Franco_Milan]
elad 1893 udp ELAD Protocol [Franco_Milan] [Franco_Milan]
o2server-port 1894 tcp O2Server Port [Tim_Howard] [Tim_Howard]
o2server-port 1894 udp O2Server Port [Tim_Howard] [Tim_Howard]
1895 tcp unassigned Microsoft (unoffically) using 1895
1895 udp unassigned Microsoft (unoffically) using 1895
b-novative-ls 1896 tcp b-novative license server [Matthias_Riese] [Matthias_Riese]
b-novative-ls 1896 udp b-novative license server [Matthias_Riese] [Matthias_Riese]
metaagent 1897 tcp MetaAgent [Marie_France_Dubreui] [Marie_France_Dubreui]
metaagent 1897 udp MetaAgent [Marie_France_Dubreui] [Marie_France_Dubreui]
cymtec-port 1898 tcp Cymtec secure management [Michael_Mester] [Michael_Mester]
cymtec-port 1898 udp Cymtec secure management [Michael_Mester] [Michael_Mester]
mc2studios 1899 tcp MC2Studios [Michael_Coon] [Michael_Coon]
mc2studios 1899 udp MC2Studios [Michael_Coon] [Michael_Coon]
ssdp 1900 tcp SSDP [UPnP_Forum] [UPnP_Forum]
ssdp 1900 udp SSDP [UPnP_Forum] [UPnP_Forum]
fjicl-tep-a 1901 tcp Fujitsu ICL Terminal Emulator Program A [Bob_Lyon] [Bob_Lyon]
fjicl-tep-a 1901 udp Fujitsu ICL Terminal Emulator Program A [Bob_Lyon] [Bob_Lyon]
fjicl-tep-b 1902 tcp Fujitsu ICL Terminal Emulator Program B [Bob_Lyon] [Bob_Lyon]
fjicl-tep-b 1902 udp Fujitsu ICL Terminal Emulator Program B [Bob_Lyon] [Bob_Lyon]
linkname 1903 tcp Local Link Name Resolution [Dan_Harrington] [Dan_Harrington]
linkname 1903 udp Local Link Name Resolution [Dan_Harrington] [Dan_Harrington]
fjicl-tep-c 1904 tcp Fujitsu ICL Terminal Emulator Program C [Bob_Lyon] [Bob_Lyon]
fjicl-tep-c 1904 udp Fujitsu ICL Terminal Emulator Program C [Bob_Lyon] [Bob_Lyon]
sugp 1905 tcp Secure UP.Link Gateway Protocol [Peter_King] [Peter_King]
sugp 1905 udp Secure UP.Link Gateway Protocol [Peter_King] [Peter_King]
tpmd 1906 tcp TPortMapperReq [Sheila_Devins] [Sheila_Devins]
tpmd 1906 udp TPortMapperReq [Sheila_Devins] [Sheila_Devins]
intrastar 1907 tcp IntraSTAR [Peter_Schoenberger] [Peter_Schoenberger]
intrastar 1907 udp IntraSTAR [Peter_Schoenberger] [Peter_Schoenberger]
dawn 1908 tcp Dawn [Michael_Crawford_2] [Michael_Crawford_2]
dawn 1908 udp Dawn [Michael_Crawford_2] [Michael_Crawford_2]
global-wlink 1909 tcp Global World Link [Nicholas_Davies] [Nicholas_Davies]
global-wlink 1909 udp Global World Link [Nicholas_Davies] [Nicholas_Davies]
ultrabac 1910 tcp UltraBac Software communications port [Paul_Bunn] [Paul_Bunn]
ultrabac 1910 udp UltraBac Software communications port [Paul_Bunn] [Paul_Bunn]
mtp 1911 tcp Starlight Networks Multimedia Transport Protocol [Bruce_Lieberman] [Bruce_Lieberman]
mtp 1911 udp Starlight Networks Multimedia Transport Protocol [Bruce_Lieberman] [Bruce_Lieberman]
rhp-iibp 1912 tcp rhp-iibp [George_Nachman][Tom_Lake] [George_Nachman][Tom_Lake]
rhp-iibp 1912 udp rhp-iibp [George_Nachman][Tom_Lake] [George_Nachman][Tom_Lake]
armadp 1913 tcp armadp [Kevin_Welton] [Kevin_Welton]
armadp 1913 udp armadp [Kevin_Welton] [Kevin_Welton]
elm-momentum 1914 tcp Elm-Momentum [Willie_Wu] [Willie_Wu]
elm-momentum 1914 udp Elm-Momentum [Willie_Wu] [Willie_Wu]
facelink 1915 tcp FACELINK [J_H_Hermans] [J_H_Hermans]
facelink 1915 udp FACELINK [J_H_Hermans] [J_H_Hermans]
persona 1916 tcp Persoft Persona [Tom_Spidell] [Tom_Spidell]
persona 1916 udp Persoft Persona [Tom_Spidell] [Tom_Spidell]
noagent 1917 tcp nOAgent [Martin_Bestmann] [Martin_Bestmann]
noagent 1917 udp nOAgent [Martin_Bestmann] [Martin_Bestmann]
can-nds 1918 tcp IBM Tivole Directory Service - NDS
can-nds 1918 udp IBM Tivole Directory Service - NDS
can-dch 1919 tcp IBM Tivoli Directory Service - DCH
can-dch 1919 udp IBM Tivoli Directory Service - DCH
can-ferret 1920 tcp IBM Tivoli Directory Service - FERRET [Nic_Catrambone] [Nic_Catrambone]
can-ferret 1920 udp IBM Tivoli Directory Service - FERRET [Nic_Catrambone] [Nic_Catrambone]
noadmin 1921 tcp NoAdmin [Martin_Bestmann] [Martin_Bestmann]
noadmin 1921 udp NoAdmin [Martin_Bestmann] [Martin_Bestmann]
tapestry 1922 tcp Tapestry [Ken_Oliver] [Ken_Oliver]
tapestry 1922 udp Tapestry [Ken_Oliver] [Ken_Oliver]
spice 1923 tcp SPICE [Nicholas_Chua] [Nicholas_Chua]
spice 1923 udp SPICE [Nicholas_Chua] [Nicholas_Chua]
xiip 1924 tcp XIIP [Alain_Robert_2] [Alain_Robert_2]
xiip 1924 udp XIIP [Alain_Robert_2] [Alain_Robert_2]
discovery-port 1925 tcp Surrogate Discovery Port [Keith_Thompson] [Keith_Thompson]
discovery-port 1925 udp Surrogate Discovery Port [Keith_Thompson] [Keith_Thompson]
egs 1926 tcp Evolution Game Server [Simon_Butcher] [Simon_Butcher]
egs 1926 udp Evolution Game Server [Simon_Butcher] [Simon_Butcher]
videte-cipc 1927 tcp Videte CIPC Port [Videte_IT] [Videte_IT]
videte-cipc 1927 udp Videte CIPC Port [Videte_IT] [Videte_IT]
emsd-port 1928 tcp Expnd Maui Srvr Dscovr [Edo_Yahav] [Edo_Yahav]
emsd-port 1928 udp Expnd Maui Srvr Dscovr [Edo_Yahav] [Edo_Yahav]

Contact Information

ID Name Organization Contact URI Last Updated
[Alain_Robert_2] Alain Robert mailto:Alain.Robert&hmrinc.com
[Bob_Lyon] Bob Lyon mailto:bl&oasis.icl.co.uk
[Bruce_Lieberman] Bruce Lieberman mailto:brucel&iserver.starlight.com
[Chris_Anderson] Chris Anderson Daegis, Inc. mailto:ianaportmaster&daegis.com 2012-07-31
[Daegis_Inc] Daegis, Inc. mailto:ianaportmaster&daegis.com 2012-07-31
[Dan_Harrington] Dan Harrington mailto:dth&lucent.com
[Dietmar_Finkler] Dietmar Finkler mailto:d.finkler&hermstedt.de
[Dr_Yair_Shapira] Dr. Yair Shapira mailto:yair&flashnetworks.com
[Edo_Yahav] Edo Yahav mailto:standards&expand.com
[Franco_Milan] Franco Milan mailto:franco&eladit.com
[George_Nachman] George Nachman
[Ivan_Berardinelli] Ivan Berardinelli mailto:ivan&gestweb.com
[J_H_Hermans] J.H. Hermans mailto:j.h.hermans&hiscom.nl
[Jane_Porter] Jane Porter mailto:janeporter&uk.ibm.com
[Katsuhiko_Abe] Katsuhiko Abe mailto:kabe&hst.fujitsu.co.jp
[Keith_Thompson] Keith Thompson mailto:keith.thompson&sun.com
[Ken_Oliver] Ken Oliver mailto:koliver02&yahoo.com
[Kevin_Welton] Kevin Welton mailto:Kevin.Welton&armltd.co.uk
[Marie_France_Dubreui] Marie-France Dubreuil mailto:Marie-France.Dubreuil&evidian.com 2002-11
[Martin_Bestmann] Martin Bestmann mailto:martin&datawatch.de
[Matthias_Riese] Matthias Riese mailto:Matthias.Riese&b-novative.de
[Megan_Woods] Megan Woods mailto:megan.woods&woods-gebler.com 2024-08-29
[Michael_Coon] Michael Coon mailto:michael&thecube.com
[Michael_Crawford_2] Michael Crawford mailto:michaelc&travsoft.com
[Michael_Mester] Michael Mester mailto:mmester&cymtec.com
[Nic_Catrambone] Nic Catrambone mailto:ncatramb&us.ibm.com 2003-01
[Nicholas_Chua] Nicholas Chua mailto:nick&sendit.se
[Nicholas_Davies] Nicholas Davies mailto:N.Davies&globalcomm.co.uk
[OASIS] OASIS mailto:robin&oasis-open.org 2015-02-10
[Paul_Bunn] Paul Bunn mailto:iana&ultrabac.com
[Paul_Wissmiller] Paul Wissmiller mailto:Paul.Wissmiller&ca.com
[Peter_King] Peter King mailto:king&uplanet.com
[Peter_Schoenberger] Peter Schoenberger mailto:ps&teles.de
[Robin_Cover] Robin Cover OASIS KMIP Technical Committee mailto:robin&oasis-open.org 2011-07-25
[Russell_Thrasher] Russell Thrasher mailto:rthrashe&veritas.com
[Sheila_Devins] Sheila Devins mailto:sheila_devins&vnet.ibm.com
[Simon_Butcher] Simon Butcher mailto:simonb&alien.net.au
[Simon_Parker] Simon Parker mailto:simon.j.parker&philips.com
[Sugih_Jamim] Sugih Jamim mailto:jamin&eecs.umich.edu
[Tim_Howard] Tim Howard mailto:timothygh&hotmail.com
[Tom_Lake] Tom Lake mailto:tlake&m-ware.com
[Tom_Spidell] Tom Spidell mailto:spidell&persoft.com
[UPnP_Forum] UPnP Forum mailto:upnpadmin&forum.upnp.org
[Videte_IT] Videte IT mailto:info&videte.com
[Wilken_GmbH] Wilken GmbH mailto:fy&wilken.de
[Willie_Wu] Willie Wu mailto:willie&mds.com
[Yariv_Kaplan] Yariv Kaplan mailto:yarivk&gilat.com