Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2025-04-07
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
pipe_server 2010 udp This entry is an alias to "pipe-server". This entry is now historic, not usable for use with many common service discovery mechanisms.
raid-cc 2011 tcp raid
servserv 2011 udp
ttyinfo 2012 tcp
raid-ac 2012 udp
raid-am 2013 tcp
raid-cd 2013 udp
troff 2014 tcp
raid-sf 2014 udp
cypress 2015 tcp
raid-cs 2015 udp
bootserver 2016 tcp
bootserver 2016 udp
cypress-stat 2017 tcp
bootclient 2017 udp
terminaldb 2018 tcp
rellpack 2018 udp
whosockami 2019 tcp
about 2019 udp
xinupageserver 2020 tcp
xinupageserver 2020 udp
servexec 2021 tcp
xinuexpansion1 2021 udp
down 2022 tcp
xinuexpansion2 2022 udp
xinuexpansion3 2023 tcp
xinuexpansion3 2023 udp
xinuexpansion4 2024 tcp
xinuexpansion4 2024 udp
ellpack 2025 tcp
xribs 2025 udp
scrabble 2026 tcp
scrabble 2026 udp
shadowserver 2027 tcp
shadowserver 2027 udp
submitserver 2028 tcp
submitserver 2028 udp
hsrpv6 2029 tcp Hot Standby Router Protocol IPv6 [Ian_Wilson] [Ian_Wilson] 2004-11
hsrpv6 2029 udp Hot Standby Router Protocol IPv6 [Ian_Wilson] [Ian_Wilson] 2004-11
device2 2030 tcp
device2 2030 udp
mobrien-chat 2031 tcp mobrien-chat [Mike_O_Brien] [Mike_O_Brien] 2004-11
mobrien-chat 2031 udp mobrien-chat [Mike_O_Brien] [Mike_O_Brien] 2004-11
blackboard 2032 tcp
blackboard 2032 udp
glogger 2033 tcp
glogger 2033 udp
scoremgr 2034 tcp
scoremgr 2034 udp
imsldoc 2035 tcp
imsldoc 2035 udp
e-dpnet 2036 tcp Ethernet WS DP network [Peter_Kaever] [Peter_Kaever] 2005-08
e-dpnet 2036 udp Ethernet WS DP network [Peter_Kaever] [Peter_Kaever] 2005-08
applus 2037 tcp APplus Application Server [Alfred_Weindl] [Marcus_Schairer] 2008-06-06 2021-07-20 Unauthorized Use Known on port 2037 Formerly was P2plus Application Server
applus 2037 udp APplus Application Server [Alfred_Weindl] [Marcus_Schairer] 2008-06-06 2021-07-20 Unauthorized Use Known on port 2037 Formerly was P2plus Application Server
objectmanager 2038 tcp
objectmanager 2038 udp
prizma 2039 tcp Prizma Monitoring Service [Dotan_Ofek] [Dotan_Ofek] 2005-12
prizma 2039 udp Prizma Monitoring Service [Dotan_Ofek] [Dotan_Ofek] 2005-12
lam 2040 tcp
lam 2040 udp
interbase 2041 tcp
interbase 2041 udp
isis 2042 tcp isis
isis 2042 udp isis
isis-bcast 2043 tcp isis-bcast [Ken_Chapman] [Ken_Chapman]
isis-bcast 2043 udp isis-bcast [Ken_Chapman] [Ken_Chapman]
rimsl 2044 tcp
rimsl 2044 udp
cdfunc 2045 tcp
cdfunc 2045 udp
sdfunc 2046 tcp
sdfunc 2046 udp
dls 2047 tcp
dls 2047 udp
dls-monitor 2048 tcp
dls-monitor 2048 udp
shilp 2049 tcp <== NOTE Conflict on 2049 !
shilp 2049 udp <== NOTE Conflict on 2049 !
nfs 2049 tcp Network File System - Sun Microsystems [Brent_Callaghan] [Brent_Callaghan] Defined TXT keys: path=<path to mount point>
nfs 2049 udp Network File System - Sun Microsystems [Brent_Callaghan] [Brent_Callaghan] Defined TXT keys: path=<path to mount point>
nfs 2049 sctp Network File System [RFC5665] Defined TXT keys: path=<path to mount point>
av-emb-config 2050 tcp Avaya EMB Config Port [John_Yeager] [John_Yeager]
av-emb-config 2050 udp Avaya EMB Config Port [John_Yeager] [John_Yeager]
epnsdp 2051 tcp EPNSDP [Hiroyasu_Ogata] [Hiroyasu_Ogata]
epnsdp 2051 udp EPNSDP [Hiroyasu_Ogata] [Hiroyasu_Ogata]
clearvisn 2052 tcp clearVisn Services Port [Dave_Lyons] [Dave_Lyons]
clearvisn 2052 udp clearVisn Services Port [Dave_Lyons] [Dave_Lyons]
lot105-ds-upd 2053 tcp Lot105 DSuper Updates [Piers_Scannell] [Piers_Scannell]
lot105-ds-upd 2053 udp Lot105 DSuper Updates [Piers_Scannell] [Piers_Scannell]
weblogin 2054 tcp Weblogin Port [Diego_Saravia] [Diego_Saravia]
weblogin 2054 udp Weblogin Port [Diego_Saravia] [Diego_Saravia]
iop 2055 tcp Iliad-Odyssey Protocol [Bruce_Lueckenhoff] [Bruce_Lueckenhoff]
iop 2055 udp Iliad-Odyssey Protocol [Bruce_Lueckenhoff] [Bruce_Lueckenhoff]
omnisky 2056 tcp OmniSky Port [Oren_Hurvitz] [Oren_Hurvitz]
omnisky 2056 udp OmniSky Port [Oren_Hurvitz] [Oren_Hurvitz]
rich-cp 2057 tcp Rich Content Protocol [Ronen_Vainish] [Ronen_Vainish]
rich-cp 2057 udp Rich Content Protocol [Ronen_Vainish] [Ronen_Vainish]
newwavesearch 2058 tcp NewWaveSearchables RMI [Thomas_Kerkau] [Thomas_Kerkau]
newwavesearch 2058 udp NewWaveSearchables RMI [Thomas_Kerkau] [Thomas_Kerkau]
bmc-messaging 2059 tcp BMC Messaging Service [Portnoy_Boxman] [Portnoy_Boxman]

Contact Information

ID Name Contact URI Last Updated
[Alfred_Weindl] Alfred Weindl mailto:alfred.weindl&assecosol.com 2021-08-09
[Brent_Callaghan] Brent Callaghan mailto:brent&terra.eng.sun.com
[Bruce_Lueckenhoff] Bruce Lueckenhoff mailto:brucelu&cisco.com
[Dave_Lyons] Dave Lyons mailto:dlyons&dnpg.com
[Diego_Saravia] Diego Saravia mailto:dsa&unsa.edu.ar
[Dotan_Ofek] Dotan Ofek mailto:dotan.ofek&prizmasoft.com 2005-12
[Hiroyasu_Ogata] Hiroyasu Ogata mailto:Ogata.Hiroyasu&exc.epson.co.jp
[Ian_Wilson] Ian Wilson mailto:hsrp-info&cisco.com 2004-11
[John_Yeager] John Yeager mailto:johnyeager&avaya.com
[Ken_Chapman] Ken Chapman mailto:kchapman&isis.com
[Marcus_Schairer] Marcus Schairer mailto:marcus.schairer&assecosol.com 2021-08-09
[Mike_O_Brien] Mike O'Brien mailto:mike&mobrien.com 2004-11
[Oren_Hurvitz] Oren Hurvitz mailto:oren&omnisky.com
[Peter_Kaever] Peter Kaever mailto:kaever.peter&westfalia.com 2005-08
[Piers_Scannell] Piers Scannell mailto:iana-form&lot105.com
[Portnoy_Boxman] Portnoy Boxman mailto:portnoy_boxman&bmc.com 2005-01
[Ronen_Vainish] Ronen Vainish mailto:ronen&digitalfountain.com
[Thomas_Kerkau] Thomas Kerkau mailto:Thomas.Kerkau&io-software.com