Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-11-19
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
6327-6342 Unassigned
sflow 6343 tcp sFlow traffic monitoring [Peter_Phaal] [Peter_Phaal] 2003-06
sflow 6343 udp sFlow traffic monitoring [Peter_Phaal] [Peter_Phaal] 2003-06
streletz 6344 tcp Argus-Spectr security and fire-prevention systems service [Argus_Spectr] [Kirill_Marinushkin] 2013-10-25
6344 udp Reserved
6345-6345 Unassigned
gnutella-svc 6346 tcp gnutella-svc [Serguei_Osokine] [Serguei_Osokine]
gnutella-svc 6346 udp gnutella-svc [Serguei_Osokine] [Serguei_Osokine]
gnutella-rtr 6347 tcp gnutella-rtr [Serguei_Osokine] [Serguei_Osokine]
gnutella-rtr 6347 udp gnutella-rtr [Serguei_Osokine] [Serguei_Osokine]
6348-6349 Unassigned
adap 6350 tcp App Discovery and Access Protocol [Thomas_Kjoernes] [Thomas_Kjoernes] 2010-06-22
adap 6350 udp App Discovery and Access Protocol [Thomas_Kjoernes] [Thomas_Kjoernes] 2010-06-22
6351-6354 Unassigned
pmcs 6355 tcp PMCS applications [Pavel_Mendl] [Pavel_Mendl] 2007-03
pmcs 6355 udp PMCS applications [Pavel_Mendl] [Pavel_Mendl] 2007-03
6356-6359 Unassigned
metaedit-mu 6360 tcp MetaEdit+ Multi-User [Steven_Kelly] [Steven_Kelly] 2007-11-12
metaedit-mu 6360 udp MetaEdit+ Multi-User [Steven_Kelly] [Steven_Kelly] 2007-11-12
6361-6362 Unassigned
ndn 6363 udp Named Data Networking [Regents_of_the_University_of_California] [Jeff_Burke] 2013-10-30
6363 tcp Reserved
6364-6369 Unassigned
metaedit-se 6370 tcp MetaEdit+ Server Administration [Steven_Kelly] [Steven_Kelly] 2007-11-12
metaedit-se 6370 udp MetaEdit+ Server Administration [Steven_Kelly] [Steven_Kelly] 2007-11-12
6371-6378 Unassigned
redis 6379 tcp An advanced key-value cache and store [Salvatore_Sanfilippo] [Itamar_Haber] 2015-04-23
6379 udp Reserved
6380-6381 Unassigned
metatude-mds 6382 tcp Metatude Dialogue Server [Menno_Zweistra] [Menno_Zweistra]
metatude-mds 6382 udp Metatude Dialogue Server [Menno_Zweistra] [Menno_Zweistra]
6383-6388 Unassigned
clariion-evr01 6389 tcp clariion-evr01 [Dave_DesRoches] [Dave_DesRoches]
clariion-evr01 6389 udp clariion-evr01 [Dave_DesRoches] [Dave_DesRoches]
metaedit-ws 6390 tcp MetaEdit+ WebService API [Steven_Kelly] [Steven_Kelly] 2007-11-12
metaedit-ws 6390 udp MetaEdit+ WebService API [Steven_Kelly] [Steven_Kelly] 2007-11-12
6391-6399 Unassigned
boe-cachesvr 6403 boe-cachesvr [Wade_Richards] [Wade_Richards] 2008-05-05
boe-resssvr3 6409 Business Objects Enterprise internal server [Wade_Richards] [Wade_Richards] 2008-05-05
6422-6431 Unassigned
pgbouncer 6432 tcp PgBouncer [Marko_Kreen] [Marko_Kreen] 2009-02-13
6432 udp Reserved
6433-6439 Unassigned
sun-sr-https 6443 tcp Service Registry Default HTTPS Domain [Paul_Sterk] [Paul_Sterk] 2006-03
sun-sr-https 6443 udp Service Registry Default HTTPS Domain [Paul_Sterk] [Paul_Sterk] 2006-03
6457-6463 Unassigned
ieee11073-20701 6464 tcp Port assignment for medical device communication in accordance to IEEE 11073-20701 [David_Gregorczyk] [David_Gregorczyk] 2017-03-02
ieee11073-20701 6464 udp Port assignment for medical device communication in accordance to IEEE 11073-20701 [David_Gregorczyk] [David_Gregorczyk] 2017-03-02
SunVTS-RMI 6483 tcp SunVTS RMI [Sumit_Arora] [Sumit_Arora] 2007-06
SunVTS-RMI 6483 udp SunVTS RMI [Sumit_Arora] [Sumit_Arora] 2007-06
boks-clntd 6503 tcp BoKS Clntd

IANA assigned this well-formed service name as a replacement for "boks_clntd".
[Magnus_Nystrom] [Magnus_Nystrom]
boks_clntd 6503 tcp BoKS Clntd [Magnus_Nystrom] [Magnus_Nystrom] This entry is an alias to "boks-clntd". This entry is now historic, not usable for use with many common service discovery mechanisms.
boks-clntd 6503 udp BoKS Clntd

IANA assigned this well-formed service name as a replacement for "boks_clntd".
[Magnus_Nystrom] [Magnus_Nystrom]
boks_clntd 6503 udp BoKS Clntd [Magnus_Nystrom] [Magnus_Nystrom] This entry is an alias to "boks-clntd". This entry is now historic, not usable for use with many common service discovery mechanisms.
dccp-udp 6511 udp Datagram Congestion Control Protocol Encapsulation for NAT Traversal [IESG] [IETF_Chair] [RFC6773]
netconf-tls 6513 tcp NETCONF over TLS [IESG] [IETF_Chair] 2024-01-24 [RFC7589][RFC-ietf-netconf-over-tls13-04]
6513 udp Reserved
lds-distrib 6543 tcp lds_distrib [Jack_Baker] [Jack_Baker] 2003-06
lds-distrib 6543 udp lds_distrib [Jack_Baker] [Jack_Baker] 2003-06
joaJewelSuite 6583 tcp JOA Jewel Suite [Bob_Rundle] [Bob_Rundle] 2005-11
joaJewelSuite 6583 udp JOA Jewel Suite [Bob_Rundle] [Bob_Rundle] 2005-11
6603-6618 Unassigned
ktelnet 6623 tcp Kerberos V5 Telnet [Robert_J_Scott] [Robert_J_Scott] 2005-08
ktelnet 6623 udp Kerberos V5 Telnet [Robert_J_Scott] [Robert_J_Scott] 2005-08
6630 Unassigned
6631 Unassigned 2004-05-28
mxodbc-connect 6632 tcp eGenix mxODBC Connect [Marc_Andre_Lemburg] [Marc_Andre_Lemburg] 2009-11-13 Unauthorized Use Known on port 6632
6632 udp Reserved
6633 tcp Reserved
cisco-vpath-tun 6633 udp Cisco vPath Services Overlay [Cisco2] [Surendra_Kumar] 2012-06-11
mpls-pm 6634 udp MPLS Performance Measurement out-of-band response [Cisco_Systems_2] [Sagar_Soni] 2014-02-20
6634 tcp Reserved
6635 tcp Reserved
mpls-udp 6635 udp Encapsulate MPLS packets in UDP tunnels. [IESG] [IETF_Chair] 2015-02-10 [RFC7510]
6636 tcp Reserved
mpls-udp-dtls 6636 udp Encapsulate MPLS packets in UDP tunnels with DTLS. [IESG] [IETF_Chair] 2015-02-10 [RFC7510]
6637-6639 Unassigned
openflow 6653 tcp OpenFlow [Open_Networking_Foundation] [Puneet_Agarwal] 2013-07-18
openflow 6653 udp OpenFlow [Open_Networking_Foundation] [Puneet_Agarwal] 2013-07-18
vision-elmd 6673 tcp vision_elmd

IANA assigned this well-formed service name as a replacement for "vision_elmd".
[Chris_Kramer] [Chris_Kramer]
vision_elmd 6673 tcp vision_elmd [Chris_Kramer] [Chris_Kramer] This entry is an alias to "vision-elmd". This entry is now historic, not usable for use with many common service discovery mechanisms.
vision-elmd 6673 udp vision_elmd

IANA assigned this well-formed service name as a replacement for "vision_elmd".
[Chris_Kramer] [Chris_Kramer]
vision_elmd 6673 udp vision_elmd [Chris_Kramer] [Chris_Kramer] This entry is an alias to "vision-elmd". This entry is now historic, not usable for use with many common service discovery mechanisms.
e-design-web 6703 tcp e-Design web [Janos_Lerch] [Janos_Lerch] 2006-02
e-design-web 6703 udp e-Design web [Janos_Lerch] [Janos_Lerch] 2006-02
6707-6713 Unassigned
6779-6783 Unassigned
bfd-lag 6784 udp Bidirectional Forwarding Detection (BFD) on Link Aggregation Group (LAG) Interfaces [IESG] [BFD_Chairs] 2012-11-08 2014-01-09 [RFC7130]
6818-6830 Unassigned
ambit-lm 6831 tcp ambit-lm [Don_Hejna] [Don_Hejna]
ambit-lm 6831 udp ambit-lm [Don_Hejna] [Don_Hejna]
6832-6840 Unassigned
6843-6849 Unassigned
6902-6923 Unassigned
6925-6934 Unassigned
ethoscan 6935 tcp EthoScan Service [Marty_Campbell] [Marty_Campbell] 2011-06-10
ethoscan 6935 udp EthoScan Service [Marty_Campbell] [Marty_Campbell] 2011-06-10
xsmsvc 6936 tcp XenSource Management Service [Roger_Klorese] [Roger_Klorese] 2006-06
xsmsvc 6936 udp XenSource Management Service [Roger_Klorese] [Roger_Klorese] 2006-06
6937-6945 Unassigned
jmact3 6961 tcp JMACT3 [Yutaka_Ono] [Yutaka_Ono]

Contact Information

ID Name Organization Contact URI Last Updated
[Argus_Spectr] Argus-Spectr mailto:mail&argus-spectr.ru 2013-10-25
[BFD_Chairs] IETF BFD Working Group Chairs mailto:bfd-chairs&tools.ietf.org 2014-01-09
[Bob_Rundle] Bob Rundle mailto:rundle&rundle.com 2005-11
[Chris_Kramer] Chris Kramer mailto:CKramer&gis.shl.com
[Cisco2] Cisco mailto:smkumar&cisco.com 2012-06-11
[Cisco_Systems_2] Cisco Systems mailto:sagsoni&cisco.com 2014-02-20
[Dave_DesRoches] Dave DesRoches mailto:ddesroches&clariion.com
[David_Gregorczyk] David Gregorczyk mailto:david.gregorczyk&draeger.com 2017-03-02
[Don_Hejna] Don Hejna mailto:djhejna&ambit.com
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[Itamar_Haber] Itamar Haber Salvatore Sanfilippo mailto:itamar&redislabs.com 2015-04-23
[Jack_Baker] Jack Baker mailto:Jack.Baker&l-3com.com 2006-02
[Janos_Lerch] Janos Lerch mailto:lerch&softic.hu 2006-02
[Jeff_Burke] Jeff Burke Regents of the University of California mailto:jburke&remap.ucla.edu 2013-10-30
[Kirill_Marinushkin] Kirill Marinushkin Argus-Spectr mailto:k.marinushkin&argus-spectr.ru 2013-10-25
[Magnus_Nystrom] Magnus Nystrom mailto:magnus&dynas.se
[Marc_Andre_Lemburg] Marc-Andre Lemburg mailto:mal&egenix.com 2009-11-13
[Marko_Kreen] Marko Kreen mailto:markokr&gmail.com 2009-02-13
[Marty_Campbell] Marty Campbell mailto:martyc&ethosinfo.com 2011-06-10
[Menno_Zweistra] Menno Zweistra mailto:m.zweistra&metatude.com
[Open_Networking_Foundation] Open Networking Foundation mailto:iana&opennetworking.org 2013-07-18
[Paul_Sterk] Paul Sterk mailto:paul.sterk&sun.com 2006-03
[Pavel_Mendl] Pavel Mendl mailto:pavel_mendl&centrum.cz 2007-03
[Peter_Phaal] Peter Phaal mailto:peter.phaal&inmon.com 2003-06
[Puneet_Agarwal] Puneet Agarwal mailto:pagarwal&broadcom.com 2013-07-18
[Regents_of_the_University_of_California] Regents of the University of California mailto:jburke&remap.ucla.edu 2013-10-30
[Robert_J_Scott] Robert J. Scott mailto:rob&hpcmo.hpc.mil 2005-08
[Roger_Klorese] Roger Klorese mailto:roger&xensource.com 2006-06
[Salvatore_Sanfilippo] Salvatore Sanfilippo mailto:antirez&gmail.com 2015-04-23
[Sagar_Soni] Sagar Soni Cisco Systems mailto:sagsoni&cisco.com 2014-02-20
[Serguei_Osokine] Serguei Osokine mailto:osokin&paragraph.com
[Steven_Kelly] Steven Kelly mailto:stevek&metacase.com 2007-11-12
[Sumit_Arora] Sumit Arora mailto:sumit.arora&sun.com 2007-06
[Surendra_Kumar] Surendra Kumar Cisco mailto:smkumar&cisco.com 2012-06-11
[Thomas_Kjoernes] Thomas Kjoernes mailto:thomas&ipv.no 2010-06-22
[Wade_Richards] Wade Richards mailto:wade.richards&sap.com 2008-05-05
[Yutaka_Ono] Yutaka Ono mailto:ono&saint.nm.fujitsu.co.jp