Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-03-18
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
isakmp 500 tcp isakmp [Mark_Schertler] [Mark_Schertler]
isakmp 500 udp isakmp [Mark_Schertler] [Mark_Schertler]
vlsi-lm 1500 tcp VLSI License Manager [Shue_Lin_Kuo] [Shue_Lin_Kuo]
vlsi-lm 1500 udp VLSI License Manager [Shue_Lin_Kuo] [Shue_Lin_Kuo]
apx500api-1 2264 tcp Audio Precision Apx500 API Port 1
apx500api-1 2264 udp Audio Precision Apx500 API Port 1
apx500api-2 2265 tcp Audio Precision Apx500 API Port 2 [Robert_Wright] [Robert_Wright]
apx500api-2 2265 udp Audio Precision Apx500 API Port 2 [Robert_Wright] [Robert_Wright]
rtsserv 2500 tcp Resource Tracking system server
rtsserv 2500 udp Resource Tracking system server
astronova-main 2864 tcp main 5001 cmd [AstroNova_Inc] [Chris_Tate] 2020-03-03
astronova-main 2864 udp main 5001 cmd [AstroNova_Inc] [Chris_Tate] 2020-03-03
rtmp-port 3500 tcp RTMP Port [Miriam_Wohlgelernter] [Miriam_Wohlgelernter]
rtmp-port 3500 udp RTMP Port [Miriam_Wohlgelernter] [Miriam_Wohlgelernter]
ipsec-nat-t 4500 tcp IPsec NAT-Traversal 2022-09-15 [RFC9329]
ipsec-nat-t 4500 udp IPsec NAT-Traversal 2017-07-07 [RFC3948][RFC7296]
commplex-main 5000 tcp
commplex-main 5000 udp
commplex-link 5001 tcp
commplex-link 5001 udp
rfe 5002 tcp radio free ethernet
rfe 5002 udp radio free ethernet
fmpro-internal 5003 tcp FileMaker, Inc. - Proprietary transport [Clay_Maeckel] [Clay_Maeckel]
fmpro-internal 5003 udp FileMaker, Inc. - Proprietary name binding [Clay_Maeckel] [Clay_Maeckel]
avt-profile-1 5004 tcp RTP media data [RFC3551][RFC4571]
avt-profile-1 5004 udp RTP media data [RFC3551]
avt-profile-1 5004 dccp RTP media data [RFC3551][RFC5762]
avt-profile-2 5005 tcp RTP control protocol [RFC3551][RFC4571]
avt-profile-2 5005 udp RTP control protocol [RFC3551]
avt-profile-2 5005 dccp RTP control protocol [RFC3551][RFC5762]
wsm-server 5006 tcp wsm server [Adam_Berk] [Adam_Berk]
wsm-server 5006 udp wsm server [Adam_Berk] [Adam_Berk]
wsm-server-ssl 5007 tcp wsm server ssl [Adam_Berk] [Adam_Berk]
wsm-server-ssl 5007 udp wsm server ssl [Adam_Berk] [Adam_Berk]
synapsis-edge 5008 tcp Synapsis EDGE [Paul_Schilling] [Paul_Schilling]
synapsis-edge 5008 udp Synapsis EDGE [Paul_Schilling] [Paul_Schilling]
winfs 5009 tcp Microsoft Windows Filesystem [Simon_Skaria] [Simon_Skaria] 2006-01
winfs 5009 udp Microsoft Windows Filesystem [Simon_Skaria] [Simon_Skaria] 2006-01
fcp-addr-srvr1 5500 tcp fcp-addr-srvr1 [Ken_Wittmer] [Ken_Wittmer]
fcp-addr-srvr1 5500 udp fcp-addr-srvr1 [Ken_Wittmer] [Ken_Wittmer]
x500ms 5757 tcp OpenMail X.500 Directory Server [OpenMail_Encyclopedi][Don_Loughry] [OpenMail_Encyclopedi][Don_Loughry]
x500ms 5757 udp OpenMail X.500 Directory Server [OpenMail_Encyclopedi][Don_Loughry] [OpenMail_Encyclopedi][Don_Loughry]
boks 6500 tcp BoKS Master [Magnus_Nystrom] [Magnus_Nystrom]
boks 6500 udp BoKS Master [Magnus_Nystrom] [Magnus_Nystrom]
silhouette 7500 tcp Silhouette User [Anthony_Payne] [Anthony_Payne] 2004-02
silhouette 7500 udp Silhouette User [Anthony_Payne] [Anthony_Payne] 2004-02
fmtp 8500 tcp Flight Message Transfer Protocol [Eivan_Cerasi] [Eivan_Cerasi] 2003-12
fmtp 8500 udp Flight Message Transfer Protocol [Eivan_Cerasi] [Eivan_Cerasi] 2003-12
ismserver 9500 tcp ismserver [Ian_Gordon_3] [Ian_Gordon_3]
ismserver 9500 udp ismserver [Ian_Gordon_3] [Ian_Gordon_3]
10500 tcp Reserved
hip-nat-t 10500 udp HIP NAT-Traversal [IESG] [IETF_Chair] 2020-08-12 [RFC5770][RFC9028]
xpra 14500 tcp xpra network protocol [Xpra] [Antoine_Martin] 2016-10-05
14500 udp Reserved
hydap 15000 tcp Hypack Data Aquisition [HYPACK_Inc] [Mircea_Neacsu] 2011-10-27
hydap 15000 udp Hypack Data Aquisition [HYPACK_Inc] [Mircea_Neacsu] 2011-10-27
15001 Unassigned
onep-tls 15002 tcp Open Network Environment TLS [Cisco_3] [Andrew_Thurber] 2014-01-21
15002 udp Reserved
15003-15117 Unassigned
db-lsp 17500 tcp Dropbox LanSync Protocol [Paul_Bohm] [Paul_Bohm] 2010-01-21
db-lsp-disc 17500 udp Dropbox LanSync Discovery [Paul_Bohm] [Paul_Bohm] 2010-01-21
icl-twobase1 25000 tcp icl-twobase1 [J_A_Sever] [J_A_Sever]
icl-twobase1 25000 udp icl-twobase1 [J_A_Sever] [J_A_Sever]
icl-twobase2 25001 tcp icl-twobase2 [J_A_Sever] [J_A_Sever]
icl-twobase2 25001 udp icl-twobase2 [J_A_Sever] [J_A_Sever]
icl-twobase3 25002 tcp icl-twobase3 [J_A_Sever] [J_A_Sever]
icl-twobase3 25002 udp icl-twobase3 [J_A_Sever] [J_A_Sever]
icl-twobase4 25003 tcp icl-twobase4 [J_A_Sever] [J_A_Sever]
icl-twobase4 25003 udp icl-twobase4 [J_A_Sever] [J_A_Sever]
icl-twobase5 25004 tcp icl-twobase5 [J_A_Sever] [J_A_Sever]
icl-twobase5 25004 udp icl-twobase5 [J_A_Sever] [J_A_Sever]
icl-twobase6 25005 tcp icl-twobase6 [J_A_Sever] [J_A_Sever]
icl-twobase6 25005 udp icl-twobase6 [J_A_Sever] [J_A_Sever]
icl-twobase7 25006 tcp icl-twobase7 [J_A_Sever] [J_A_Sever]
icl-twobase7 25006 udp icl-twobase7 [J_A_Sever] [J_A_Sever]
icl-twobase8 25007 tcp icl-twobase8 [J_A_Sever] [J_A_Sever]
icl-twobase8 25007 udp icl-twobase8 [J_A_Sever] [J_A_Sever]
icl-twobase9 25008 tcp icl-twobase9 [J_A_Sever] [J_A_Sever]
icl-twobase9 25008 udp icl-twobase9 [J_A_Sever] [J_A_Sever]
icl-twobase10 25009 tcp icl-twobase10 [J_A_Sever] [J_A_Sever]
icl-twobase10 25009 udp icl-twobase10 [J_A_Sever] [J_A_Sever]
heathview 35000 tcp HeathView [Heathwest_Systems_Limited] [Andrew_Porrer] 2013-03-21
35000 udp Reserved
rt-viewer 35001 tcp ReadyTech Viewer [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
rt-viewer 35001 udp ReadyTech Viewer [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
rt-sound 35002 tcp ReadyTech Sound Server [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
35002 udp Reserved
rt-devicemapper 35003 tcp ReadyTech DeviceMapper Server [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
35003 udp Reserved
rt-classmanager 35004 tcp ReadyTech ClassManager [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
rt-classmanager 35004 udp ReadyTech ClassManager [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
rt-labtracker 35005 tcp ReadyTech LabTracker [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
35005 udp Reserved
rt-helper 35006 tcp ReadyTech Helper Service [ReadyTech_Corporation] [Kevin_Woodward] 2013-09-13
35006 udp Reserved
35007-35099 Unassigned
asmp 45000 tcp Nuance AutoStore Status Monitoring Protocol (data transfer) [Nuance_Communications_Inc4] [Andrew_Andrews] 2011-09-01 2017-04-26
asmp-mon 45000 udp Nuance AutoStore Status Monitoring Protocol (device monitoring) [Nuance_Communications_Inc4] [Andrew_Andrews] 2011-09-01 2017-04-26
asmps 45001 tcp Nuance AutoStore Status Monitoring Protocol (secure data transfer) [Nuance_Communications_Inc4] [Andrew_Andrews] 2011-09-01 2017-04-26

Contact Information

ID Name Organization Contact URI Last Updated
[Adam_Berk] Adam Berk mailto:aberk&empirix.com
[Andrew_Andrews] Andrew Andrews mailto:Andrew.Andrews&Nuance.com 2017-04-26
[Andrew_Porrer] Andrew Porrer Heathwest Systems Limited mailto:Andrew.Porrer&heathwest.com 2013-03-21
[Andrew_Thurber] Andrew Thurber Cisco mailto:anthurbe@cisco.com> 2014-01-21
[Anthony_Payne] Anthony Payne mailto:opayne&pacbell.net 2004-02
[Antoine_Martin] Antoine Martin mailto:antoine&nagafix.co.uk 2016-10-05
[AstroNova_Inc] AstroNova, Inc. mailto:ctate&astronovainc.com 2020-03-03
[Chris_Tate] Chris Tate mailto:ctate&astronovainc.com 2020-03-03
[Cisco_3] Cisco mailto:anthurbe@cisco.com> 2014-01-21
[Clay_Maeckel] Clay Maeckel mailto:clay&claris.com 2023-09-12
[Don_Loughry] Don Loughry mailto:DON_LOUGHRY&hp-cupertino-om4.om.hp.com
[Eivan_Cerasi] Eivan Cerasi mailto:eivan.cerasi&eurocontrol.int 2022-08-08
[Heathwest_Systems_Limited] Heathwest Systems Limited mailto:info&heathwest.com 2013-03-21
[HYPACK_Inc] HYPACK Inc. mailto:mircea&hypack.com 2011-10-27
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[Ian_Gordon_3] Ian Gordon mailto:iang&micromuse.co.uk
[J_A_Sever] J. A. (Tony) Sever mailto:J.A.Sever&bra0119.wins.icl.co.uk
[Ken_Wittmer] Ken Wittmer mailto:kenneth.m.wittmer&accenture.com
[Kevin_Woodward] Kevin Woodward ReadyTech Corporation mailto:kwoodward&readytech.com 2013-09-13
[Magnus_Nystrom] Magnus Nystrom mailto:magnus&dynas.se
[Mark_Schertler] Mark Schertler mailto:mjs&tycho.ncsc.mil
[Mircea_Neacsu] Mircea Neacsu mailto:mircea&hypack.com 2011-10-27
[Miriam_Wohlgelernter] Miriam Wohlgelernter mailto:miriamw&adirtech.com
[Nuance_Communications_Inc4] Nuance Communications, Inc. mailto:dev&nsius.com 2017-04-26
[OpenMail_Encyclopedi] OpenMail Encyclopedia mailto:opencyc&hpopd.pwd.hp.com
[Paul_Bohm] Paul Bohm mailto:paul&dropbox.com 2010-01-21
[Paul_Schilling] Paul Schilling mailto:PaulS&synapsis.com
[ReadyTech_Corporation] ReadyTech Corporation mailto:kwoodward&readytech.com 2013-09-13
[Robert_Wright] Robert Wright, Founder and Principal Engineer Audio Precision Inc. mailto:ianaports&ap.com 2006-05
[Shue_Lin_Kuo] Shue-Lin Kuo mailto:shuelin&mdk.sanjose.vlsi.com
[Simon_Skaria] Simon Skaria mailto:simonsk&microsoft.com 2006-01
[Xpra] Xpra mailto:xpra&xpra.org 2016-10-05