Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2024-10-15
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
apsolab-rpc 5474 udp The Apsolab company's status query protocol [Apsolab_Inc] [Jean-Francois_Gauthier] 2014-11-10
5474 tcp Reserved
apsolab-data 5475 tcp The Apsolab company's data retrieval protocol [Apsolab_Inc] [Jean-Francois_Gauthier] 2014-11-10
5475 udp Reserved
5476-5499 Unassigned
fcp-addr-srvr1 5500 tcp fcp-addr-srvr1 [Ken_Wittmer] [Ken_Wittmer]
fcp-addr-srvr1 5500 udp fcp-addr-srvr1 [Ken_Wittmer] [Ken_Wittmer]
fcp-addr-srvr2 5501 tcp fcp-addr-srvr2 [Ken_Wittmer] [Ken_Wittmer]
fcp-addr-srvr2 5501 udp fcp-addr-srvr2 [Ken_Wittmer] [Ken_Wittmer]
fcp-srvr-inst1 5502 tcp fcp-srvr-inst1 [Ken_Wittmer] [Ken_Wittmer]
fcp-srvr-inst1 5502 udp fcp-srvr-inst1 [Ken_Wittmer] [Ken_Wittmer]
fcp-srvr-inst2 5503 tcp fcp-srvr-inst2 [Ken_Wittmer] [Ken_Wittmer]
fcp-srvr-inst2 5503 udp fcp-srvr-inst2 [Ken_Wittmer] [Ken_Wittmer]
fcp-cics-gw1 5504 tcp fcp-cics-gw1 [Ken_Wittmer] [Ken_Wittmer]
fcp-cics-gw1 5504 udp fcp-cics-gw1 [Ken_Wittmer] [Ken_Wittmer]
checkoutdb 5505 tcp Checkout Database [Dirk_Stoop] [Dirk_Stoop] 2007-04
checkoutdb 5505 udp Checkout Database [Dirk_Stoop] [Dirk_Stoop] 2007-04
amc 5506 tcp Amcom Mobile Connect [Aaron_Fracht_Monroe] [Aaron_Fracht_Monroe] 2010-06-03
amc 5506 udp Amcom Mobile Connect [Aaron_Fracht_Monroe] [Aaron_Fracht_Monroe] 2010-06-03
psl-management 5507 tcp PowerSysLab Electrical Management [PowerSysLab] [Lucas_Lorensi] 2015-07-20
5507 udp Reserved
5508-5539 Unassigned
matter 5540 tcp Matter Operational Discovery and Communi [Connectivity_Standards_Alliance] [Aron_Rosenberg] 2021-07-16
matter 5540 udp Matter Operational Discovery and Communi [Connectivity_Standards_Alliance] [Aron_Rosenberg] 2021-07-16
5541-5542 Unassigned
qftest-licserve 5543 tcp QF-Test License Server [Quality_First_Software_GmbH] [Gregor_Schmid] 2024-01-05
5543 udp Reserved
5544-5549 Unassigned
cbus 5550 tcp Model Railway control using the CBUS message protocol [MERG] [Pete_Brownlow] 2017-01-03
5550 udp Reserved
5551-5552 Unassigned
sgi-eventmond 5553 tcp SGI Eventmond Port [Andrei_Vilkotski] [Andrei_Vilkotski] 2003-06
sgi-eventmond 5553 udp SGI Eventmond Port [Andrei_Vilkotski] [Andrei_Vilkotski] 2003-06
sgi-esphttp 5554 tcp SGI ESP HTTP [Vladimir_Legalov] [Vladimir_Legalov]
sgi-esphttp 5554 udp SGI ESP HTTP [Vladimir_Legalov] [Vladimir_Legalov]
personal-agent 5555 tcp Personal Agent [Jackie_Wu] [Jackie_Wu] Known UNAUTHORIZED USEs on port 5555
personal-agent 5555 udp Personal Agent [Jackie_Wu] [Jackie_Wu] Known UNAUTHORIZED USEs on port 5555
freeciv 5556 tcp Freeciv gameplay [Reinier_Post_and_Pau] [Reinier_Post_and_Pau] 2006-01 Known Unauthorized Use on port 5556
freeciv 5556 udp Freeciv gameplay [Reinier_Post_and_Pau] [Reinier_Post_and_Pau] 2006-01 Known Unauthorized Use on port 5556
farenet 5557 tcp Sandlab FARENET [Kay_T_Labinsky] [Kay_T_Labinsky] 2010-05-03
5557 udp Reserved
5558-5564 Unassigned
dp-bura 5565 tcp Data Protector BURA [Micro_Focus] [Shishir_Misra] 2016-01-13 2019-10-04
5565 udp Reserved
westec-connect 5566 tcp Westec Connect [Jon_Bolen] [Jon_Bolen] 2009-03-18
5566 udp Reserved
dof-dps-mc-sec 5567 tcp DOF Protocol Stack Multicast/Secure Transport [OpenDOF] [Bryant_Eastham] 2004-11 2015-04-23
dof-dps-mc-sec 5567 udp DOF Protocol Stack Multicast/Secure Transport [OpenDOF] [Bryant_Eastham] 2004-11 2015-04-23
sdt 5568 tcp Session Data Transport Multicast [Daniel_W_Antonuk] [Daniel_W_Antonuk] 2006-05
sdt 5568 udp Session Data Transport Multicast [Daniel_W_Antonuk] [Daniel_W_Antonuk] 2006-05
rdmnet-ctrl 5569 tcp PLASA E1.33, Remote Device Management (RDM) controller status notifications [PLASA] [Simon_Newton] 2012-06-01
rdmnet-device 5569 udp PLASA E1.33, Remote Device Management (RDM) messages [PLASA] [Simon_Newton] 2012-06-01
5570-5572 Unassigned Known UNAUTHORIZED USE on Port 5570
sdmmp 5573 tcp SAS Domain Management Messaging Protocol [Ron_Zuckerman] [Ron_Zuckerman] 2007-08-30
sdmmp 5573 udp SAS Domain Management Messaging Protocol [Ron_Zuckerman] [Ron_Zuckerman] 2007-08-30
lsi-bobcat 5574 tcp SAS IO Forwarding [Mandar_Joshi] [Mandar_Joshi] 2009-02-09
5574 udp Reserved
ora-oap 5575 tcp Oracle Access Protocol [Peter_Povinec] [Peter_Povinec] 2010-04-13
5575 udp Reserved
5576-5578 Unassigned
fdtracks 5579 tcp FleetDisplay Tracking Service [Henrik_Woffinden] [Henrik_Woffinden] 2008-09-22
5579 udp Reserved
tmosms0 5580 tcp T-Mobile SMS Protocol Message 0 [Ezinne_Oji] [Ezinne_Oji] 2006-06
tmosms0 5580 udp T-Mobile SMS Protocol Message 0 [Ezinne_Oji] [Ezinne_Oji] 2006-06
tmosms1 5581 tcp T-Mobile SMS Protocol Message 1 [Ezinne_Oji] [Ezinne_Oji] 2006-06
tmosms1 5581 udp T-Mobile SMS Protocol Message 1 [Ezinne_Oji] [Ezinne_Oji] 2006-06
fac-restore 5582 tcp T-Mobile SMS Protocol Message 3 [Jessica_Yan] [Jessica_Yan] 2008-02-19
fac-restore 5582 udp T-Mobile SMS Protocol Message 3 [Jessica_Yan] [Jessica_Yan] 2008-02-19
tmo-icon-sync 5583 tcp T-Mobile SMS Protocol Message 2 [Donghwan_Lim] [Donghwan_Lim] 2008-01-22
tmo-icon-sync 5583 udp T-Mobile SMS Protocol Message 2 [Donghwan_Lim] [Donghwan_Lim] 2008-01-22
bis-web 5584 tcp BeInSync-Web [Adi_Ruppin] [Adi_Ruppin] 2005-08
bis-web 5584 udp BeInSync-Web [Adi_Ruppin] [Adi_Ruppin] 2005-08
bis-sync 5585 tcp BeInSync-sync [Adi_Ruppin] [Adi_Ruppin] 2005-08
bis-sync 5585 udp BeInSync-sync [Adi_Ruppin] [Adi_Ruppin] 2005-08
att-mt-sms 5586 tcp Planning to send mobile terminated SMS to the specific port so that the SMS is not visible to the client [ATT] [Dhillesh_Sigilipelli] 2014-08-21
5586 udp Reserved
5587-5596 Unassigned
ininmessaging 5597 tcp inin secure messaging [Mike_Gagle_2] [Mike_Gagle_2] 2006-05
ininmessaging 5597 udp inin secure messaging [Mike_Gagle_2] [Mike_Gagle_2] 2006-05
mctfeed 5598 tcp MCT Market Data Feed [Stephane_Touizer] [Stephane_Touizer] 2006-05
mctfeed 5598 udp MCT Market Data Feed [Stephane_Touizer] [Stephane_Touizer] 2006-05
esinstall 5599 tcp Enterprise Security Remote Install [Kimberly_Gibbs] [Kimberly_Gibbs]
esinstall 5599 udp Enterprise Security Remote Install [Kimberly_Gibbs] [Kimberly_Gibbs]
esmmanager 5600 tcp Enterprise Security Manager [Kimberly_Gibbs] [Kimberly_Gibbs]
esmmanager 5600 udp Enterprise Security Manager [Kimberly_Gibbs] [Kimberly_Gibbs]
esmagent 5601 tcp Enterprise Security Agent [Kimberly_Gibbs] [Kimberly_Gibbs]
esmagent 5601 udp Enterprise Security Agent [Kimberly_Gibbs] [Kimberly_Gibbs]
a1-msc 5602 tcp A1-MSC [Mike_Dolan] [Mike_Dolan]
a1-msc 5602 udp A1-MSC [Mike_Dolan] [Mike_Dolan]
a1-bs 5603 tcp A1-BS [Mike_Dolan] [Mike_Dolan]
a1-bs 5603 udp A1-BS [Mike_Dolan] [Mike_Dolan]
a3-sdunode 5604 tcp A3-SDUNode [Mike_Dolan] [Mike_Dolan]
a3-sdunode 5604 udp A3-SDUNode [Mike_Dolan] [Mike_Dolan]
a4-sdunode 5605 tcp A4-SDUNode [Mike_Dolan] [Mike_Dolan]
a4-sdunode 5605 udp A4-SDUNode [Mike_Dolan] [Mike_Dolan]
5606-5617 Unassigned
efr 5618 tcp Fiscal Registering Protocol [efsta_IT_Services_GmbH] [Ernst_Bewersdorff] 2013-08-13 2022-02-02
5618 udp Reserved
5619-5626 Unassigned
ninaf 5627 tcp Node Initiated Network Association Forma [Thomas_Scholl] [Thomas_Scholl] 2006-03
ninaf 5627 udp Node Initiated Network Association Forma [Thomas_Scholl] [Thomas_Scholl] 2006-03

Contact Information

ID Name Organization Contact URI Last Updated
[Aaron_Fracht_Monroe] Aaron Fracht-Monroe mailto:afracht-monroe&amcomsoft.com 2010-06-03
[Adi_Ruppin] Adi Ruppin mailto:adi.ruppin&data-pod.com 2005-08
[Andrei_Vilkotski] Andrei Vilkotski mailto:andreiv&sgi.com 2003-06
[Apsolab_Inc] Apsolab Inc. mailto:admin&apsolab.com 2014-11-10
[Aron_Rosenberg] Aron Rosenberg Connectivity Standards Alliance mailto:arosenberg&logitech.com 2021-07-16
[ATT] AT&T mailto:ds978v&att.com 2014-08-21
[Bryant_Eastham] Bryant Eastham OenDOF mailto:protocol&opendof.org 2015-04-23
[Connectivity_Standards_Alliance] Connectivity Standards Alliance mailto:ianaregistrations&mail.csa-iot.org 2021-07-23
[Daniel_W_Antonuk] Daniel W. Antonuk mailto:dantonuk&etcconnect.com 2006-05
[Dhillesh_Sigilipelli] Dhillesh Sigilipelli AT&T mailto:ds978v&att.com 2014-08-21
[Dirk_Stoop] Dirk Stoop mailto:dirk&madebysofa.com 2007-04
[Donghwan_Lim] Donghwan Lim mailto:donghwan.lim&t-mobile.com 2008-01-22
[efsta_IT_Services_GmbH] efsta IT Services GmbH mailto:admin&efsta.eu 2022-02-02
[Ernst_Bewersdorff] Ernst Bewersdorff efsta IT Services GmbH mailto:e.bewersdorff&efsta.eu 2022-02-02
[Ezinne_Oji] Ezinne Oji mailto:ezinne.oji&t-mobile.com 2006-06
[Gregor_Schmid] Gregor Schmid mailto:gregor.schmid&qfs.de 2024-01-05
[Henrik_Woffinden] Henrik Woffinden mailto:hw&nitramlexa.com 2008-09-22
[Jackie_Wu] Jackie Wu mailto:jackiew&infoseek.com
[Jean-Francois_Gauthier] Jean-Francois Gauthier Apsolab Inc. mailto:jfgauthier&apsolab.com 2014-11-10
[Jessica_Yan] Jessica Yan mailto:jessica.yan2&t-mobile.com 2008-02-19
[Jon_Bolen] Jon Bolen mailto:jon.bolen&westec.net 2009-03-18
[Kay_T_Labinsky] Kay T. Labinsky mailto:Kay.Labinsky&sandlab.de 2010-05-03
[Ken_Wittmer] Ken Wittmer mailto:kenneth.m.wittmer&accenture.com
[Kimberly_Gibbs] Kimberly Gibbs mailto:kimgib&ccgate-ut.axent.com
[Lucas_Lorensi] Lucas Lorensi mailto:lucas.lorensi&powersyslab.com 2015-07-20
[Mandar_Joshi] Mandar Joshi mailto:mandar.joshi&lsi.com 2009-02-09
[MERG] MERG mailto:merg&upsys.co.uk 2017-01-03
[Micro_Focus] Micro Focus mailto:swpdl.dp.rd&microfocus.com 2019-09-30
[Mike_Dolan] Mike Dolan mailto:MDolan&ihcmail.ih.lucent.com
[Mike_Gagle_2] Mike Gagle mailto:mikeg&inin.com 2006-05
[OpenDOF] OpenDOF mailto:protocol&opendof.org 2015-04-23
[Pete_Brownlow] Pete Brownlow mailto:merg&upsys.co.uk 2017-01-03
[Peter_Povinec] Peter Povinec mailto:peter.povinec&oracle.com 2010-04-13
[PLASA] PLASA mailto:standards.na&plasa.org 2012-06-01
[PowerSysLab] PowerSysLab mailto:info&powersyslab.com 2015-07-20
[Quality_First_Software_GmbH] Quality First Software GmbH mailto:qfs&qfs.de 2024-01-05
[Reinier_Post_and_Pau] Reinier Post and Paul Zastoupil mailto:freeciv&freeciv.org 2006-01
[Ron_Zuckerman] Ron Zuckerman mailto:ron.zuckerman&lsi.com 2007-08-30
[Shishir_Misra] Shishir Misra mailto:shishir.misra&microfocus.com 2019-09-30
[Simon_Newton] Simon Newton mailto:simon&nomis52.net 2012-06-01
[Stephane_Touizer] Stephane Touizer mailto:touizer&microcaptrade.com 2006-05
[Thomas_Scholl] Thomas Scholl mailto:tscholl&spf.is-is.ca 2006-03
[Vladimir_Legalov] Vladimir Legalov mailto:legalov&sgi.com