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
lorica-out-sec 4083 tcp Lorica outside facing (SSL) [Johannes_Skov_Frands] [Johannes_Skov_Frands] 2008-02-28
lorica-out-sec 4083 udp Lorica outside facing (SSL) [Johannes_Skov_Frands] [Johannes_Skov_Frands] 2008-02-28
pvxpluscs 4093 tcp Pvx Plus CS Host [Michael_King] [Michael_King] 2006-07
pvxpluscs 4093 udp Pvx Plus CS Host [Michael_King] [Michael_King] 2006-07
brlp-2 4103 tcp Braille protocol
brlp-2 4103 udp Braille protocol
brlp-3 4104 tcp Braille protocol [Sebastien_Hinderer] [Sebastien_Hinderer] 2006-03
brlp-3 4104 udp Braille protocol [Sebastien_Hinderer] [Sebastien_Hinderer] 2006-03
aipn-reg 4113 tcp AIPN LS Registration [Qiang_Zhang_2] [Qiang_Zhang_2] 2006-10
aipn-reg 4113 udp AIPN LS Registration [Qiang_Zhang_2] [Qiang_Zhang_2] 2006-10
z-wave 4123 tcp Z-Wave Protocol [Sigma_Designs_Inc_2] [Anders_Brandt][Mary_Miller] 2007-02 2012-11-08
z-wave 4123 udp Z-Wave Protocol [Sigma_Designs_Inc_2] [Anders_Brandt][Mary_Miller] 2007-02 2012-11-08
fronet 4130 tcp FRONET message protocol [Christer_Nygren] [Christer_Nygren] 2007-08-07
fronet 4130 udp FRONET message protocol [Christer_Nygren] [Christer_Nygren] 2007-08-07
stars 4131 tcp Global Maintech Stars [Harry_Goldschmitt_2] [Harry_Goldschmitt_2] 2007-06
stars 4131 udp Global Maintech Stars [Harry_Goldschmitt_2] [Harry_Goldschmitt_2] 2007-06
nuts-dem 4132 tcp NUTS Daemon

IANA assigned this well-formed service name as a replacement for "nuts_dem".
nuts_dem 4132 tcp NUTS Daemon This entry is an alias to "nuts-dem". This entry is now historic, not usable for use with many common service discovery mechanisms.
nuts-dem 4132 udp NUTS Daemon

IANA assigned this well-formed service name as a replacement for "nuts_dem".
nuts_dem 4132 udp NUTS Daemon This entry is an alias to "nuts-dem". This entry is now historic, not usable for use with many common service discovery mechanisms.
nuts-bootp 4133 tcp NUTS Bootp Server

IANA assigned this well-formed service name as a replacement for "nuts_bootp".
[Martin_Freiss_2] [Martin_Freiss_2]
nuts_bootp 4133 tcp NUTS Bootp Server [Martin_Freiss_2] [Martin_Freiss_2] This entry is an alias to "nuts-bootp". This entry is now historic, not usable for use with many common service discovery mechanisms.
nuts-bootp 4133 udp NUTS Bootp Server

IANA assigned this well-formed service name as a replacement for "nuts_bootp".
[Martin_Freiss_2] [Martin_Freiss_2]
nuts_bootp 4133 udp NUTS Bootp Server [Martin_Freiss_2] [Martin_Freiss_2] This entry is an alias to "nuts-bootp". This entry is now historic, not usable for use with many common service discovery mechanisms.
nifty-hmi 4134 tcp NIFTY-Serve HMI protocol [Ryuichi_Suzuki] [Ryuichi_Suzuki]
nifty-hmi 4134 udp NIFTY-Serve HMI protocol [Ryuichi_Suzuki] [Ryuichi_Suzuki]
cl-db-attach 4135 tcp Classic Line Database Server Attach
cl-db-attach 4135 udp Classic Line Database Server Attach
cl-db-request 4136 tcp Classic Line Database Server Request
cl-db-request 4136 udp Classic Line Database Server Request
cl-db-remote 4137 tcp Classic Line Database Server Remote [Arno_Kirmeir] [Arno_Kirmeir] 2007-01
cl-db-remote 4137 udp Classic Line Database Server Remote [Arno_Kirmeir] [Arno_Kirmeir] 2007-01
nettest 4138 tcp nettest [David_Borman] [David_Borman] 2003-03
nettest 4138 udp nettest [David_Borman] [David_Borman] 2003-03
thrtx 4139 tcp Imperfect Networks Server [Dinkar_Chivaluri_2] [Dinkar_Chivaluri_2] 2006-02
thrtx 4139 udp Imperfect Networks Server [Dinkar_Chivaluri_2] [Dinkar_Chivaluri_2] 2006-02
cedros-fds 4140 tcp Cedros Fraud Detection System

IANA assigned this well-formed service name as a replacement for "cedros_fds".
[Markus_Michels_3] [Markus_Michels_3] 2006-10
cedros_fds 4140 tcp Cedros Fraud Detection System [Markus_Michels_3] [Markus_Michels_3] 2006-10 This entry is an alias to "cedros-fds". This entry is now historic, not usable for use with many common service discovery mechanisms.
cedros-fds 4140 udp Cedros Fraud Detection System

IANA assigned this well-formed service name as a replacement for "cedros_fds".
[Markus_Michels_3] [Markus_Michels_3] 2006-10
cedros_fds 4140 udp Cedros Fraud Detection System [Markus_Michels_3] [Markus_Michels_3] 2006-10 This entry is an alias to "cedros-fds". This entry is now historic, not usable for use with many common service discovery mechanisms.
oidsr 4143 tcp Document Replication [Norman_Brie] [Norman_Brie]
oidsr 4143 udp Document Replication [Norman_Brie] [Norman_Brie]
mbl-battd 4153 tcp MBL Remote Battery Monitoring [Claudio_Procida] [Claudio_Procida] 2007-05
mbl-battd 4153 udp MBL Remote Battery Monitoring [Claudio_Procida] [Claudio_Procida] 2007-05
silverpeakpeer 4163 tcp Silver Peak Peer Protocol [Damon_Ennis] [Damon_Ennis] 2007-03
silverpeakpeer 4163 udp Silver Peak Peer Protocol [Damon_Ennis] [Damon_Ennis] 2007-03
4173 tcp Reserved
mma-discovery 4173 udp MMA Device Discovery [MIDI_Manufacturers_Assoc_Inc] [Tom_White] 2011-11-14
cyborgnet 4183 tcp CyborgNet communications protocol [Gareth_Nelson] [Gareth_Nelson] 2015-11-13
cyborgnet 4183 udp CyborgNet communications protocol [Gareth_Nelson] [Gareth_Nelson] 2015-11-13
pvxplusio 4193 tcp PxPlus remote file srvr [Mike_King] [Mike_King] 2009-11-09
4193 udp Reserved
corelccam 4300 tcp Corel CCam [Jason_Aiken] [Jason_Aiken]
corelccam 4300 udp Corel CCam [Jason_Aiken] [Jason_Aiken]
d-data 4301 tcp Diagnostic Data
d-data 4301 udp Diagnostic Data
d-data-control 4302 tcp Diagnostic Data Control [Jon_March] [Jon_March] 2006-09
d-data-control 4302 udp Diagnostic Data Control [Jon_March] [Jon_March] 2006-09
srcp 4303 tcp Simple Railroad Command Protocol [Matthias_Trute] [Matthias_Trute] 2007-01
srcp 4303 udp Simple Railroad Command Protocol [Matthias_Trute] [Matthias_Trute] 2007-01
owserver 4304 tcp One-Wire Filesystem Server [Paul_Alfille] [Paul_Alfille] 2007-01 Defined TXT keys: txtvers
owserver 4304 udp One-Wire Filesystem Server [Paul_Alfille] [Paul_Alfille] 2007-01 Defined TXT keys: txtvers
batman 4305 tcp better approach to mobile ad-hoc networking [Simon_Wunderlich] [Simon_Wunderlich] 2007-08-30
batman 4305 udp better approach to mobile ad-hoc networking [Simon_Wunderlich] [Simon_Wunderlich] 2007-08-30
pinghgl 4306 tcp Hellgate London [David_Berk] [David_Berk] 2007-08-30
pinghgl 4306 udp Hellgate London [David_Berk] [David_Berk] 2007-08-30
trueconf 4307 tcp TrueConf Videoconference Service [Dmitry_Odintsov] [Lev_Yakupov] 2007-10-22 2017-05-12
trueconf 4307 udp TrueConf Videoconference Service [Dmitry_Odintsov] [Lev_Yakupov] 2007-10-22 2017-05-12
compx-lockview 4308 tcp CompX-LockView [John_Payson] [John_Payson] 2007-10-22
compx-lockview 4308 udp CompX-LockView [John_Payson] [John_Payson] 2007-10-22
dserver 4309 tcp Exsequi Appliance Discovery [Angelo_Masci] [Angelo_Masci] 2007-01
dserver 4309 udp Exsequi Appliance Discovery [Angelo_Masci] [Angelo_Masci] 2007-01
mirrtex 4310 tcp Mir-RT exchange service [Sylvain_Robert] [Sylvain_Robert] 2008-02-14
mirrtex 4310 udp Mir-RT exchange service [Sylvain_Robert] [Sylvain_Robert] 2008-02-14
p6ssmc 4311 tcp P6R Secure Server Management Console [Jim_Susoy] [Jim_Susoy] 2010-01-21
4311 udp Reserved
pscl-mgt 4312 tcp Parascale Membership Manager [John_Muth] [John_Muth] 2010-01-21
4312 udp Reserved
perrla 4313 tcp PERRLA User Services [Cliff_Batson] [Cliff_Batson] 2010-01-21
4313 udp Reserved
choiceview-agt 4314 tcp ChoiceView Agent [Radish_Systems] [Richard_A_Davis] 2013-03-28
4314 udp Reserved
4315 Unassigned Unauthorized Use Known on port 4315
choiceview-clt 4316 tcp ChoiceView Client [Radish_Systems] [Richard_A_Davis] 2013-03-28
4316 udp Reserved
opentelemetry 4317 tcp OpenTelemetry Protocol [OpenTelemetry] [Morgan_McLean] 2020-12-09
4317 udp Reserved
4318 Unassigned
fox-skytale 4319 tcp Fox SkyTale encrypted communication [Fox_Crypto_BV] [Frans_van_Dorsselaer] 2022-01-20
fox-skytale 4319 udp Fox SkyTale encrypted communication [Fox_Crypto_BV] [Frans_van_Dorsselaer] 2022-01-20
fdt-rcatp 4320 tcp FDT Remote Categorization Protocol [Russell_P_Holsclaw] [Russell_P_Holsclaw] 2006-03
fdt-rcatp 4320 udp FDT Remote Categorization Protocol [Russell_P_Holsclaw] [Russell_P_Holsclaw] 2006-03
rwhois 4321 tcp Remote Who Is [Mark_Kosters] [Mark_Kosters] [RFC2167]
rwhois 4321 udp Remote Who Is [Mark_Kosters] [Mark_Kosters] [RFC2167]
trim-event 4322 tcp TRIM Event Service
trim-event 4322 udp TRIM Event Service
trim-ice 4323 tcp TRIM ICE Service [Siva_Poobalasingam_2] [Siva_Poobalasingam_2] 2007-02
trim-ice 4323 udp TRIM ICE Service [Siva_Poobalasingam_2] [Siva_Poobalasingam_2] 2007-02
4324 Reserved 2015-05-12 This entry is being removed on 2015-05-12.
geognosisadmin 4325 tcp Cadcorp GeognoSIS Administrator [Computer_Aided_Development_Corporation_Ltd] [Martin_Daly] 2022-08-12
geognosisman 4325 udp Cadcorp GeognoSIS Administrator [Computer_Aided_Development_Corporation_Ltd] [Martin_Daly] 2022-08-12

Contact Information

ID Name Organization Contact URI Last Updated
[Anders_Brandt] Anders Brandt Sigma Designs, Inc. mailto:Anders_Brandt&sigmadesigns.com 2012-11-08
[Angelo_Masci] Angelo Masci mailto:angelomasci&yahoo.co.uk 2007-01
[Arno_Kirmeir] Arno Kirmeir mailto:Arno.kirmeir&sage.de 2007-01
[Christer_Nygren] Christer Nygren mailto:christer.nygren&fro.se 2007-08-07
[Claudio_Procida] Claudio Procida mailto:claudio&emeraldion.it 2007-05
[Cliff_Batson] Cliff Batson mailto:cliff&perrla.com 2010-01-21
[Computer_Aided_Development_Corporation_Ltd] Computer Aided Development Corporation Ltd (Cadcorp) mailto:martin.daly&cadcorp.com 2022-08-12
[Damon_Ennis] Damon Ennis mailto:damon&silver-peak.com 2007-03
[David_Berk] David Berk mailto:dberk&ping-0.com 2007-08-30
[David_Borman] David Borman mailto:david.borman&quantum.com 2015-02-05
[Dinkar_Chivaluri_2] Dinkar Chivaluri mailto:dchivaluri&imperfectnetworks.com 2006-02
[Dmitry_Odintsov] Dmitry Odintsov mailto:dimodin&trueconf.com 2017-05-12
[Fox_Crypto_BV] Fox Crypto B.V. mailto:iana&fox-it.com 2022-01-20
[Frans_van_Dorsselaer] Frans van Dorsselaer Fox Crypto B.V. mailto:frans.vandorsselaer&foxcrypto.com 2022-01-20
[Gareth_Nelson] Gareth Nelson mailto:gareth&garethnelson.com 2015-11-13
[Harry_Goldschmitt_2] Harry Goldschmitt mailto:harry&hgac.com 2007-06
[Jason_Aiken] Jason Aiken mailto:jasona&corelcomputer.com
[Jim_Susoy] Jim Susoy mailto:jim.susoy&p6r.com 2010-01-21
[Johannes_Skov_Frands] Johannes Skov Frandsen mailto:joe&42tools.com 2008-02-28
[John_Muth] John Muth mailto:muth&parascale.com 2010-01-21
[John_Payson] John Payson mailto:john&circad.com 2007-10-22
[Jon_March] Jon March mailto:jon.march&paget-analyst-services.co.uk 2006-09
[Lev_Yakupov] Lev Yakupov mailto:lyakupov&trueconf.com 2017-05-12
[Mark_Kosters] Mark Kosters mailto:markk&internic.net
[Markus_Michels_3] Markus Michels mailto:markus.michels&cedros.com 2006-10
[Martin_Daly] Martin Daly mailto:martin.daly&cadcorp.com 2022-08-12
[Martin_Freiss_2] Martin Freiss mailto:freiss.pad@sni.
[Mary_Miller] Mary Miller Sigma Designs, Inc. mailto:Mary_Miller&sigmadesigns.com 2012-11-08
[Matthias_Trute] Matthias Trute mailto:mtrute&web.de 2007-01
[Michael_King] Michael King mailto:mike.king&pvxplus.com 2006-07
[MIDI_Manufacturers_Assoc_Inc] MIDI Manufacturers Assoc Inc mailto:info&midi.org 2011-11-14
[Mike_King] Mike King mailto:mike.king&pvxplus.com 2009-11-09
[Morgan_McLean] Morgan McLean OpenTelemetry mailto:morgan_mclean&hotmail.com 2020-12-09
[Norman_Brie] Norman Brie mailto:norm_brie&sns.ca
[OpenTelemetry] OpenTelemetry mailto:cncf-opentelemetry-governance&lists.cncf.io 2020-12-09
[Paul_Alfille] Paul Alfille mailto:paul.alfille&gmail.com 2007-01
[Qiang_Zhang_2] Qiang Zhang mailto:iad&iwncomm.com 2006-10
[Radish_Systems] Radish Systems mailto:rad&radishsystems.com 2013-03-28
[Richard_A_Davis] Richard A. Davis Radish Systems mailto:rad&radishsystems.com 2013-03-28
[Russell_P_Holsclaw] Russell P. Holsclaw Fast Data Technology Inc. mailto:rholsclaw&fastdatatech.com 2006-03
[Ryuichi_Suzuki] Ryuichi Suzuki mailto:SCI00376&niftyserve.or.jp
[Sebastien_Hinderer] Sébastien Hinderer mailto:Sebastien.Hinderer&ens-lyon.org 2006-03
[Sigma_Designs_Inc_2] Sigma Designs, Inc. mailto:pr&sdesigns.com 2012-11-08
[Simon_Wunderlich] Simon Wunderlich mailto:siwu&hrz.tu-chemnitz.de 2007-08-30
[Siva_Poobalasingam_2] Siva Poobalasingam mailto:Siva.Poobalasingam&towersoft.com.au 2007-02
[Sylvain_Robert] Sylvain Robert mailto:sylvain.robert&datadis.com 2008-02-14
[Tom_White] Tom White MIDI Manufacturers Assoc Inc mailto:info&midi.org 2011-11-14