Service Name and Transport Protocol Port Number Registry

Last Updated
2018-12-03
Expert(s)
TCP/UDP: Joe Touch; Eliot Lear, Allison Mankin, Markku Kojo, Kumiko Ono, Martin Stiemerling, 
Lars Eggert, Alexey Melnikov, Wes Eddy, Alexander Zimmermann, Brian Trammell, and Jana Iyengar
SCTP: Allison Mankin and 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 difference uses of these ranges is 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.                                                   *
************************************************************************
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Service Name Port Number Transport Protocol Description Assignee Contact Registration Date Modification Date Reference Service Code Known Unauthorized Uses Assignment Notes
smtp 25 tcp Simple Mail Transfer [IESG] [IETF_Chair] 2017-06-05 [RFC5321]
smtp 25 udp Simple Mail Transfer [IESG] [IETF_Chair] 2017-06-05 [RFC5321]
domain 53 tcp Domain Name Server [Paul_Mockapetris] [Paul_Mockapetris]
domain 53 udp Domain Name Server [Paul_Mockapetris] [Paul_Mockapetris]
sgmp 153 tcp SGMP [Marty_Schoffstahl] [Marty_Schoffstahl]
sgmp 153 udp SGMP [Marty_Schoffstahl] [Marty_Schoffstahl]
ndsauth 353 tcp NDSAUTH [Jayakumar_Ramalingam] [Jayakumar_Ramalingam]
ndsauth 353 udp NDSAUTH [Jayakumar_Ramalingam] [Jayakumar_Ramalingam]
creativeserver 453 tcp CreativeServer
creativeserver 453 udp CreativeServer
courier 530 tcp rpc
courier 530 udp rpc
conference 531 tcp chat
conference 531 udp chat
netnews 532 tcp readnews
netnews 532 udp readnews
netwall 533 tcp for emergency broadcasts [Andreas_Heidemann] [Andreas_Heidemann]
netwall 533 udp for emergency broadcasts [Andreas_Heidemann] [Andreas_Heidemann]
windream 534 tcp windream Admin [Uwe_Honermann] [Uwe_Honermann]
windream 534 udp windream Admin [Uwe_Honermann] [Uwe_Honermann]
iiop 535 tcp iiop [Jeff_M_Michaud] [Jeff_M_Michaud]
iiop 535 udp iiop [Jeff_M_Michaud] [Jeff_M_Michaud]
opalis-rdv 536 tcp opalis-rdv [Laurent_Domenech] [Laurent_Domenech]
opalis-rdv 536 udp opalis-rdv [Laurent_Domenech] [Laurent_Domenech]
nmsp 537 tcp Networked Media Streaming Protocol [Paul_Santinelli_Jr] [Paul_Santinelli_Jr]
nmsp 537 udp Networked Media Streaming Protocol [Paul_Santinelli_Jr] [Paul_Santinelli_Jr]
gdomap 538 tcp gdomap [Richard_Frith_Macdon] [Richard_Frith_Macdon]
gdomap 538 udp gdomap [Richard_Frith_Macdon] [Richard_Frith_Macdon]
apertus-ldp 539 tcp Apertus Technologies Load Determination
apertus-ldp 539 udp Apertus Technologies Load Determination
pirp 553 tcp pirp [D_J_Bernstein] [D_J_Bernstein]
pirp 553 udp pirp [D_J_Bernstein] [D_J_Bernstein]
repscmd 653 tcp RepCmd [Scott_Dale_2] [Scott_Dale_2]
repscmd 653 udp RepCmd [Scott_Dale_2] [Scott_Dale_2]
rrh 753 tcp
rrh 753 udp
domain-s 853 tcp DNS query-response protocol run over TLS/DTLS [IESG] [IETF_Chair] 2015-10-08 2017-01-23 [RFC7858][RFC8094]
domain-s 853 udp DNS query-response protocol run over TLS/DTLS [IESG] [IETF_Chair] 2015-10-08 2017-01-23 [RFC7858][RFC8094]
twamp-control 862 tcp Two-way Active Measurement Protocol (TWAMP) Control [RFC5357]
twamp-control 862 udp Two-way Active Measurement Protocol (TWAMP) Control [RFC5357]
rndc 953 tcp BIND9 remote name daemon controller [Internet_Systems_Consortium_Inc] [Ray_Bellis] 2017-06-08
953 udp Reserved
remote-as 1053 tcp Remote Assistant (RA) [Roman_Kriis] [Roman_Kriis] Unauthorized Use Known on port 1053
remote-as 1053 udp Remote Assistant (RA) [Roman_Kriis] [Roman_Kriis]
ltp-deepspace 1113 tcp Licklider Transmission Protocol [RFC5326]
ltp-deepspace 1113 udp Licklider Transmission Protocol 2014-02-21 [RFC5326][RFC7122]
c1222-acse 1153 tcp ANSI C12.22 Port [RFC6142]
c1222-acse 1153 udp ANSI C12.22 Port [RFC6142]
q55-pcc 1253 tcp q55-pcc [Prem_Tirilok] [Prem_Tirilok]
q55-pcc 1253 udp q55-pcc [Prem_Tirilok] [Prem_Tirilok]
relief 1353 tcp Relief Consulting [John_Feiler] [John_Feiler]
relief 1353 udp Relief Consulting [John_Feiler] [John_Feiler]
genie-lm 1453 tcp Genie License Manager [Paul_Applegate] [Paul_Applegate]
genie-lm 1453 udp Genie License Manager [Paul_Applegate] [Paul_Applegate]
rap-service 1530 tcp rap-service
rap-service 1530 udp rap-service
rap-listen 1531 tcp rap-listen [Phil_Servita] [Phil_Servita]
rap-listen 1531 udp rap-listen [Phil_Servita] [Phil_Servita]
miroconnect 1532 tcp miroconnect [Michael_Fischer_2] [Michael_Fischer_2]
miroconnect 1532 udp miroconnect [Michael_Fischer_2] [Michael_Fischer_2]
virtual-places 1533 tcp Virtual Places Software [Avshalom_Houri] [Avshalom_Houri]
virtual-places 1533 udp Virtual Places Software [Avshalom_Houri] [Avshalom_Houri]
micromuse-lm 1534 tcp micromuse-lm [Adam_Kerrison] [Adam_Kerrison]
micromuse-lm 1534 udp micromuse-lm [Adam_Kerrison] [Adam_Kerrison]
ampr-info 1535 tcp ampr-info
ampr-info 1535 udp ampr-info
ampr-inter 1536 tcp ampr-inter [Rob_Janssen] [Rob_Janssen]
ampr-inter 1536 udp ampr-inter [Rob_Janssen] [Rob_Janssen]
sdsc-lm 1537 tcp isi-lm [Len_Wanger] [Len_Wanger]
sdsc-lm 1537 udp isi-lm [Len_Wanger] [Len_Wanger]
3ds-lm 1538 tcp 3ds-lm [Keith_Trummel] [Keith_Trummel]
3ds-lm 1538 udp 3ds-lm [Keith_Trummel] [Keith_Trummel]
intellistor-lm 1539 tcp Intellistor License Manager [Ron_Vaughn] [Ron_Vaughn]
intellistor-lm 1539 udp Intellistor License Manager [Ron_Vaughn] [Ron_Vaughn]
sna-cs 1553 tcp sna-cs [Tony_Sowter] [Tony_Sowter]
sna-cs 1553 udp sna-cs [Tony_Sowter] [Tony_Sowter]
alphatech-lm 1653 tcp alphatech-lm [Joseph_Hauk] [Joseph_Hauk]
alphatech-lm 1653 udp alphatech-lm [Joseph_Hauk] [Joseph_Hauk]
predatar-comms 1753 tcp Predatar Comms Service [Silverstring_Ltd] [Ronnie_De_Giorgio] 2011-09-15
1753 udp Reserved
vids-avtp 1853 tcp VIDS-AVTP [Sascha_Kuemmel] [Sascha_Kuemmel]
vids-avtp 1853 udp VIDS-AVTP [Sascha_Kuemmel] [Sascha_Kuemmel]
rapidbase 1953 tcp Rapid Base [Antoni_Wolski] [Antoni_Wolski]
rapidbase 1953 udp Rapid Base [Antoni_Wolski] [Antoni_Wolski]
lot105-ds-upd 2053 tcp Lot105 DSuper Updates [Piers_Scannell] [Piers_Scannell]
lot105-ds-upd 2053 udp Lot105 DSuper Updates [Piers_Scannell] [Piers_Scannell]
ctlptc 2153 tcp Control Protocol
ctlptc 2153 udp Control Protocol
dtv-chan-req 2253 tcp DTV Channel Request [Richard_Hodges] [Richard_Hodges]
dtv-chan-req 2253 udp DTV Channel Request [Richard_Hodges] [Richard_Hodges]
pspserver 2353 tcp pspserver
pspserver 2353 udp pspserver
madge-ltd 2453 tcp madge ltd [Mark_Lyall] [Mark_Lyall]
madge-ltd 2453 udp madge ltd [Mark_Lyall] [Mark_Lyall]
vrcommerce 2530 tcp VR Commerce [Yosi_Mass] [Yosi_Mass]
vrcommerce 2530 udp VR Commerce [Yosi_Mass] [Yosi_Mass]
ito-e-gui 2531 tcp ITO-E GUI [Michael_Haeuptle] [Michael_Haeuptle]
ito-e-gui 2531 udp ITO-E GUI [Michael_Haeuptle] [Michael_Haeuptle]
ovtopmd 2532 tcp OVTOPMD [Eric_Pulsipher] [Eric_Pulsipher]
ovtopmd 2532 udp OVTOPMD [Eric_Pulsipher] [Eric_Pulsipher]

People

ID Name Organization Contact URI Last Updated
[Adam_Kerrison] Adam Kerrison mailto:adam&micromuse.co.uk
[Andreas_Heidemann] Andreas Heidemann mailto:a.heidemann&ais-gmbh.de
[Antoni_Wolski] Antoni Wolski mailto:antoni.wolski&vtt.fi
[Avshalom_Houri] Avshalom Houri mailto:Avshalom&ubique.com
[D_J_Bernstein] D. J. Bernstein mailto:ports&box.cr.yp.to 2018-04-05
[Eric_Pulsipher] Eric Pulsipher mailto:eric_pulsipher&hp.com
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[Internet_Systems_Consortium_Inc] Internet Systems Consortium, Inc. mailto:info&isc.org 2017-06-08
[Jayakumar_Ramalingam] Jayakumar Ramalingam mailto:jayakumar&novell.com
[Jeff_M_Michaud] Jeff M.Michaud mailto:michaud&zk3.dec.com
[John_Feiler] John Feiler mailto:relief!jjfeiler&uu2.psi.com
[Joseph_Hauk] Joseph Hauk mailto:joseph.hauk&alphatech.com
[Keith_Trummel] Keith Trummel mailto:ktrummel&autodesk.com
[Laurent_Domenech] Laurent Domenech Opalis mailto:ldomenech&opalis.com
[Len_Wanger] Len Wanger mailto:lrw&sdsc.edu
[Mark_Lyall] Mark Lyall mailto:mark.lyall&madge.com
[Marty_Schoffstahl] Marty Schoffstahl mailto:schoff&nisc.nyser.net
[Michael_Fischer_2] Michael Fischer tel:+49-531-21-13-0
[Michael_Haeuptle] Michael Haeuptle mailto:Michael_Haeuptle&hp.com
[Paul_Applegate] Paul Applegate mailto:p.applegate2&genie.geis.com
[Paul_Mockapetris] Paul Mockapetris mailto:PVM&isi.edu
[Paul_Santinelli_Jr] Paul Santinelli Jr. mailto:psantinelli&narrative.com
[Phil_Servita] Phil Servita mailto:meister&ftp.com
[Piers_Scannell] Piers Scannell mailto:iana-form&lot105.com
[Prem_Tirilok] Prem Tirilok mailto:Prem.Tirilok&tellabs.com
[Ray_Bellis] Ray Bellis mailto:ray&isc.org 2017-06-08
[Richard_Frith_Macdon] Richard Frith-Macdonald mailto:richard&brainstorm.co.uk
[Richard_Hodges] Richard Hodges mailto:rh&matriplex.com
[Rob_Janssen] Rob Janssen mailto:rob&sys3.pe1chl.ampr.org
[Roman_Kriis] Roman Kriis mailto:roman&previo.ee
[Ron_Vaughn] Ron Vaughn mailto:rv&intellistor.com
[Ronnie_De_Giorgio] Ronnie De Giorgio Silverstring Ltd. mailto:rdegiorgio&silverstring.com 2011-09-15
[Sascha_Kuemmel] Sascha Kuemmel mailto:kuemmel&vidsoft.de
[Scott_Dale_2] Scott Dale mailto:scott&tioga.com
[Silverstring_Ltd] Silverstring Ltd. mailto:rdegiorgio&silverstring.com 2011-09-15
[Tony_Sowter] Tony Sowter mailto:ts&datcon.co.uk
[Uwe_Honermann] Uwe Honermann mailto:u.honermann&windream.com
[Yosi_Mass] Yosi Mass mailto:yosimass&haifa.vnet.ibm.com