Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-12-20
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
kftp-data 6620 tcp Kerberos V5 FTP Data [Robert_J_Scott] [Robert_J_Scott] 2005-08
kftp-data 6620 udp Kerberos V5 FTP Data [Robert_J_Scott] [Robert_J_Scott] 2005-08
kftp 6621 tcp Kerberos V5 FTP Control [Robert_J_Scott] [Robert_J_Scott] 2005-08
kftp 6621 udp Kerberos V5 FTP Control [Robert_J_Scott] [Robert_J_Scott] 2005-08
mcftp 6622 tcp Multicast FTP [Bruce_Lueckenhoff_2] [Bruce_Lueckenhoff_2] 2006-02
mcftp 6622 udp Multicast FTP [Bruce_Lueckenhoff_2] [Bruce_Lueckenhoff_2] 2006-02
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
datascaler-db 6624 tcp DataScaler database [Vasu_Murthy] [Vasu_Murthy] 2010-02-08
6624 udp Reserved
datascaler-ctl 6625 tcp DataScaler control [Vasu_Murthy] [Vasu_Murthy] 2010-02-08
6625 udp Reserved
wago-service 6626 tcp WAGO Service and Update [Wolfgang_Adler] [Wolfgang_Adler] 2006-04
wago-service 6626 udp WAGO Service and Update [Wolfgang_Adler] [Wolfgang_Adler] 2006-04
nexgen 6627 tcp Allied Electronics NeXGen [Lou_Seitchik] [Lou_Seitchik] 2005-08
nexgen 6627 udp Allied Electronics NeXGen [Lou_Seitchik] [Lou_Seitchik] 2005-08
afesc-mc 6628 tcp AFE Stock Channel M/C [K_K_Ho] [K_K_Ho] 2004-04
afesc-mc 6628 udp AFE Stock Channel M/C [K_K_Ho] [K_K_Ho] 2004-04
nexgen-aux 6629 tcp Secondary, (non ANDI) multi-protocol multi-function interface to the Allied ANDI-based family of forecourt controllers [Allied_Electronics] [Robert_E_Tomenchok_Jr] 2016-11-29
nexgen-aux 6629 udp Secondary, (non ANDI) multi-protocol multi-function interface to the Allied ANDI-based family of forecourt controllers [Allied_Electronics] [Robert_E_Tomenchok_Jr] 2016-11-29
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
ovsdb 6640 tcp Open vSwitch Database protocol [Bruce_Davie_2] [Bruce_Davie_2] 2013-07-31 [RFC7047]
6640 udp Reserved
6641-6652 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
6654 Unassigned
pcs-sf-ui-man 6655 tcp PC SOFT - Software factory UI/manager [Jerome_AERTS] [Jerome_AERTS] 2010-11-30
6655 udp Reserved
emgmsg 6656 tcp Emergency Message Control Service [Gerry_Gorman] [Gerry_Gorman] 2010-12-06
6656 udp Reserved
6657 tcp Reserved
palcom-disc 6657 udp PalCom Discovery [Boris_Magnusson] [Boris_Magnusson] 2010-12-06
6658-6664 Unassigned Unauthorized Use Known on Port 6659
ircu 6665-6669 tcp IRCU [Brian_Tackett] [Brian_Tackett]
6665-6669 udp Reserved
vocaltec-gold 6670 tcp Vocaltec Global Online Directory [Scott_Petrack] [Scott_Petrack]
vocaltec-gold 6670 udp Vocaltec Global Online Directory [Scott_Petrack] [Scott_Petrack]
p4p-portal 6671 tcp P4P Portal Service [Chris_Griffiths] [Chris_Griffiths] 2008-07-28
p4p-portal 6671 udp P4P Portal Service [Chris_Griffiths] [Chris_Griffiths] 2008-07-28
vision-server 6672 tcp vision_server

IANA assigned this well-formed service name as a replacement for "vision_server".
[Chris_Kramer] [Chris_Kramer]
vision_server 6672 tcp vision_server [Chris_Kramer] [Chris_Kramer] This entry is an alias to "vision-server". This entry is now historic, not usable for use with many common service discovery mechanisms.
vision-server 6672 udp vision_server

IANA assigned this well-formed service name as a replacement for "vision_server".
[Chris_Kramer] [Chris_Kramer]
vision_server 6672 udp vision_server [Chris_Kramer] [Chris_Kramer] This entry is an alias to "vision-server". This entry is now historic, not usable for use with many common service discovery mechanisms.
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.
6674-6677 Unassigned
vfbp 6678 tcp Viscount Freedom Bridge Protocol [Chris_MacDonald] [Chris_MacDonald] 2011-03-16
vfbp-disc 6678 udp Viscount Freedom Bridge Discovery [Chris_MacDonald] [Chris_MacDonald] 2011-03-16
osaut 6679 tcp Osorno Automation [Peter_Hombach] [Peter_Hombach] 2011-03-16
osaut 6679 udp Osorno Automation [Peter_Hombach] [Peter_Hombach] 2011-03-16
6680-6686 Unassigned
clever-ctrace 6687 tcp CleverView for cTrace Message Service [David_Cheng] [David_Cheng] 2010-02-01
6687 udp Reserved
clever-tcpip 6688 tcp CleverView for TCP/IP Message Service [David_Cheng] [David_Cheng] 2009-10-13
6688 udp Reserved
tsa 6689 tcp Tofino Security Appliance [Scott_Howard] [Scott_Howard] 2009-10-13
tsa 6689 udp Tofino Security Appliance [Scott_Howard] [Scott_Howard] 2009-10-13
cleverdetect 6690 tcp CLEVERDetect Message Service [Applied_Expert_Systems_Inc] [David_Cheng] 2014-12-03
6690 udp Reserved
6691-6695 Unassigned
6696 tcp Reserved
babel 6696 udp Babel Routing Protocol 2011-08-15 [RFC8966]
ircs-u 6697 tcp Internet Relay Chat via TLS/SSL 2014-02-11 [RFC7194]
6697 udp Reserved 2014-02-11
6698 Unassigned
6699 tcp Reserved
babel-dtls 6699 udp Babel Routing Protocol over DTLS [IESG] [IETF_Chair] 2020-09-04 [RFC8968]
6700 Unassigned 2010-01-26
kti-icad-srvr 6701 tcp KTI/ICAD Nameserver [Stanley_Knutson] [Stanley_Knutson]
kti-icad-srvr 6701 udp KTI/ICAD Nameserver [Stanley_Knutson] [Stanley_Knutson]
6701 sctp Unassigned 2010-01-26
e-design-net 6702 tcp e-Design network [Janos_Lerch] [Janos_Lerch] 2006-02
e-design-net 6702 udp e-Design network [Janos_Lerch] [Janos_Lerch] 2006-02
6702 sctp Unassigned 2010-01-26
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
6704 udp Reserved
6704 tcp Reserved
frc-hp 6704 sctp ForCES HP (High Priority) channel [RFC5811]
6705 udp Reserved
6705 tcp Reserved
frc-mp 6705 sctp ForCES MP (Medium Priority) channel [RFC5811]
6706 udp Reserved
6706 tcp Reserved
frc-lp 6706 sctp ForCES LP (Low priority) channel [RFC5811]
6707-6713 Unassigned

Contact Information

ID Name Organization Contact URI Last Updated
[Allied_Electronics] Allied Electronics mailto:Rob&AlliedElectronics.com 2016-11-29
[Applied_Expert_Systems_Inc] Applied Expert Systems, Inc. mailto:davec&aesclever.com 2014-12-03
[Boris_Magnusson] Boris Magnusson mailto:boris&cs.lth.se 2010-12-06
[Brian_Tackett] Brian Tackett mailto:cym&acrux.net
[Bruce_Davie_2] Bruce Davie mailto:bdavie&vmware.com 2013-07-31
[Bruce_Lueckenhoff_2] Bruce Lueckenhoff mailto:bruce&scalabledesign.com 2006-02
[Chris_Griffiths] Chris Griffiths mailto:chris_griffiths&cable.comcast.com 2008-07-28
[Chris_Kramer] Chris Kramer mailto:CKramer&gis.shl.com
[Chris_MacDonald] Chris MacDonald mailto:chris&viscount.com 2011-03-16
[Cisco2] Cisco mailto:smkumar&cisco.com 2012-06-11
[Cisco_Systems_2] Cisco Systems mailto:sagsoni&cisco.com 2014-02-20
[David_Cheng] David Cheng mailto:davec&aesclever.com 2010-02-01
[Gerry_Gorman] Gerry Gorman mailto:gerry.gorman&emclock.com 2010-12-06
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[Janos_Lerch] Janos Lerch mailto:lerch&softic.hu 2006-02
[Jerome_AERTS] Jerome AERTS mailto:info&pcsoft.fr 2010-11-30
[K_K_Ho] K. K Ho mailto:kk.ho&afe-solutions.com 2004-04
[Lou_Seitchik] Lou Seitchik mailto:lou&alliedelectronics.com 2005-08
[Marc_Andre_Lemburg] Marc-Andre Lemburg mailto:mal&egenix.com 2009-11-13
[Open_Networking_Foundation] Open Networking Foundation mailto:iana&opennetworking.org 2013-07-18
[Peter_Hombach] Peter Hombach mailto:p.hombach&osorno.ca 2011-03-16
[Puneet_Agarwal] Puneet Agarwal mailto:pagarwal&broadcom.com 2013-07-18
[Robert_E_Tomenchok_Jr] Robert E. Tomenchok Jr. mailto:Rob&AlliedElectronics.com 2016-11-29
[Robert_J_Scott] Robert J. Scott mailto:rob&hpcmo.hpc.mil 2005-08
[Sagar_Soni] Sagar Soni Cisco Systems mailto:sagsoni&cisco.com 2014-02-20
[Scott_Howard] Scott Howard mailto:scott&byressecurity.com 2009-10-13
[Scott_Petrack] Scott Petrack mailto:Scott_Petrack&vocaltec.com
[Stanley_Knutson] Stanley Knutson mailto:Stanley.Knutson&ktiworld.com
[Surendra_Kumar] Surendra Kumar Cisco mailto:smkumar&cisco.com 2012-06-11
[Vasu_Murthy] Vasu Murthy mailto:vmurthy&datascaler.com 2010-02-08
[Wolfgang_Adler] Wolfgang Adler mailto:electronicc_rd&wago.com 2006-04