Internet Assigned Numbers Authority

Service Name and Transport Protocol Port Number Registry

Last Updated
2022-08-12
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.                                                   *
************************************************************************
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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
device 801 tcp
device 801 udp
fcp-udp 810 tcp FCP [Paul_Whittemore] [Paul_Whittemore]
fcp-udp 810 udp FCP Datagram [Paul_Whittemore] [Paul_Whittemore]
811-827 Unassigned
netconf-beep 831 tcp NETCONF over BEEP [RFC4744]
netconf-beep 831 udp NETCONF over BEEP [RFC4744]
dlep 854 tcp Dynamic Link Exchange Protocol (DLEP) [IESG] [IETF_Chair] 2017-04-03 [RFC8175]
dlep 854 udp Dynamic Link Exchange Protocol (DLEP) [IESG] [IETF_Chair] 2017-04-03 [RFC8175]
iscsi 860 tcp iSCSI [IESG] [IETF_Chair] 2013-08-27 [RFC7143]
iscsi 860 udp iSCSI [IESG] [IETF_Chair] 2013-08-27 [RFC7143]
owamp-control 861 tcp OWAMP-Control [IESG] [IETF_Chair] [RFC4656]
owamp-test 861 udp OWAMP-Test [IESG] [IETF_Chair] 2018-12-21 [RFC8545]
smpnameres 901 tcp SMPNAMERES [Leif_Ekblad] [Leif_Ekblad]
smpnameres 901 udp SMPNAMERES [Leif_Ekblad] [Leif_Ekblad]
kink 910 tcp Kerberized Internet Negotiation of Keys (KINK) [RFC4430]
kink 910 udp Kerberized Internet Negotiation of Keys (KINK) [RFC4430]
xact-backup 911 tcp xact-backup [Bill_Carroll] [Bill_Carroll]
xact-backup 911 udp xact-backup [Bill_Carroll] [Bill_Carroll]
apex-mesh 912 tcp APEX relay-relay service
apex-mesh 912 udp APEX relay-relay service
apex-edge 913 tcp APEX endpoint-relay service [RFC3340]
apex-edge 913 udp APEX endpoint-relay service [RFC3340]
914-952 Unassigned
nas 991 tcp Netnews Administration System [Vera_Heinau][Heiko_Schlichting] [Vera_Heinau][Heiko_Schlichting] 2017-02-10 [RFC4707]
nas 991 udp Netnews Administration System [Vera_Heinau][Heiko_Schlichting] [Vera_Heinau][Heiko_Schlichting] 2017-02-10 [RFC4707]
imaps 993 tcp IMAP over TLS protocol [IESG] [IETF_Chair] 2021-02-22 [RFC3501][RFC8314][RFC9051]
993 udp Reserved 2021-02-22 [RFC9051]
pop3s 995 tcp POP3 over TLS protocol [IESG] [IETF_Chair] 2017-12-12 [RFC8314]
cadlock2 1000 tcp
cadlock2 1000 udp
webpush 1001 tcp HTTP Web Push [IESG] [IETF_Chair] 2016-11-01 [RFC8030]
1001 udp Reserved
1002-1007 Unassigned
1008 udp Possibly used by Sun Solaris????
1009 Unassigned
surf 1010 tcp surf [Joseph_Geer] [Joseph_Geer]
surf 1010 udp surf [Joseph_Geer] [Joseph_Geer]
1011-1020 Reserved
exp1 1021 tcp RFC3692-style Experiment 1 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp1 1021 udp RFC3692-style Experiment 1 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp1 1021 sctp RFC3692-style Experiment 1 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp1 1021 dccp RFC3692-style Experiment 1 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp2 1022 tcp RFC3692-style Experiment 2 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp2 1022 udp RFC3692-style Experiment 2 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp2 1022 sctp RFC3692-style Experiment 2 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
exp2 1022 dccp RFC3692-style Experiment 2 [IESG] [IETF_Chair] [1][RFC4727][RFC6335]
1023 tcp Reserved [IANA] [IANA]
1023 udp Reserved [IANA] [IANA]
1024 tcp Reserved [IANA] [IANA]
1024 udp Reserved [IANA] [IANA]
blackjack 1025 tcp network blackjack
blackjack 1025 udp network blackjack
cap 1026 tcp Calendar Access Protocol [Doug_Royer] [Doug_Royer] 2010-12-09
cap 1026 udp Calendar Access Protocol [Doug_Royer] [Doug_Royer] 2010-12-09
6a44 1027 udp IPv6 Behind NAT44 CPEs [IESG] [IETF_Chair] 2012-08-02 [RFC6751]
1027 tcp Reserved
1028 Deprecated 2004-02
solid-mux 1029 tcp Solid Mux Server [Anders_Borg] [Anders_Borg] 2004-11
solid-mux 1029 udp Solid Mux Server [Anders_Borg] [Anders_Borg] 2004-11
1030 Reserved 2013-05-24 This entry is being removed on 2013-05-24.
1031 Reserved 2013-05-24 This entry is being removed on 2013-05-24.
1032 Reserved 2013-05-24 This entry is being removed on 2013-05-24.
netinfo-local 1033 tcp local netinfo port [Marc_Majka] [Marc_Majka] 2002-08
netinfo-local 1033 udp local netinfo port [Marc_Majka] [Marc_Majka] 2002-08
activesync 1034 tcp ActiveSync Notifications [Sandra_Vargas] [Sandra_Vargas] 2003-03
activesync 1034 udp ActiveSync Notifications [Sandra_Vargas] [Sandra_Vargas] 2003-03
mxxrlogin 1035 tcp MX-XR RPC [Valassis] [John_Eckert] 2003-04 2015-05-05
mxxrlogin 1035 udp MX-XR RPC [Valassis] [John_Eckert] 2003-04 2015-05-05
nsstp 1036 tcp Nebula Secure Segment Transfer Protocol [Steve_Ravida] [Steve_Ravida]
nsstp 1036 udp Nebula Secure Segment Transfer Protocol [Steve_Ravida] [Steve_Ravida]
ams 1037 tcp AMS [Ronald_R_Ohmer] [Ronald_R_Ohmer] 2004-02
ams 1037 udp AMS [Ronald_R_Ohmer] [Ronald_R_Ohmer] 2004-02
mtqp 1038 tcp Message Tracking Query Protocol [RFC3887]
mtqp 1038 udp Message Tracking Query Protocol [RFC3887]
sbl 1039 tcp Streamlined Blackhole [Jonathan_A_Zdziaras] [Jonathan_A_Zdziaras] 2004-11
sbl 1039 udp Streamlined Blackhole [Jonathan_A_Zdziaras] [Jonathan_A_Zdziaras] 2004-11
netarx 1040 tcp Netarx Netcare [Sandy_Kronenberg] [Sandy_Kronenberg] 2008-04-03
netarx 1040 udp Netarx Netcare [Sandy_Kronenberg] [Sandy_Kronenberg] 2008-04-03
danf-ak2 1041 tcp AK2 Product [Karl_Palsson] [Karl_Palsson] 2004-11
danf-ak2 1041 udp AK2 Product [Karl_Palsson] [Karl_Palsson] 2004-11
afrog 1042 tcp Subnet Roaming [Michael_Chapman] [Michael_Chapman] 2004-11
afrog 1042 udp Subnet Roaming [Michael_Chapman] [Michael_Chapman] 2004-11
boinc-client 1043 tcp BOINC Client Control [David_Anderson] [David_Anderson] 2004-11
boinc-client 1043 udp BOINC Client Control [David_Anderson] [David_Anderson] 2004-11
dcutility 1044 tcp Dev Consortium Utility [Chris_Ryland] [Chris_Ryland] 2004-11
dcutility 1044 udp Dev Consortium Utility [Chris_Ryland] [Chris_Ryland] 2004-11
fpitp 1045 tcp Fingerprint Image Transfer Protocol [Steven_Fields] [Steven_Fields] 2002-02
fpitp 1045 udp Fingerprint Image Transfer Protocol [Steven_Fields] [Steven_Fields] 2002-02
wfremotertm 1046 tcp WebFilter Remote Monitor [Tim_Morgan] [Tim_Morgan] 2004-11
wfremotertm 1046 udp WebFilter Remote Monitor [Tim_Morgan] [Tim_Morgan] 2004-11
neod1 1047 tcp Sun's NEO Object Request Broker
neod1 1047 udp Sun's NEO Object Request Broker
neod2 1048 tcp Sun's NEO Object Request Broker [Rohit_Garg] [Rohit_Garg]
neod2 1048 udp Sun's NEO Object Request Broker [Rohit_Garg] [Rohit_Garg]
td-postman 1049 tcp Tobit David Postman VPMN [Franz_Josef_Leuders] [Franz_Josef_Leuders]
td-postman 1049 udp Tobit David Postman VPMN [Franz_Josef_Leuders] [Franz_Josef_Leuders]
cma 1050 tcp CORBA Management Agent [Ramy_Zaarour] [Ramy_Zaarour]
cma 1050 udp CORBA Management Agent [Ramy_Zaarour] [Ramy_Zaarour]
optima-vnet 1051 tcp Optima VNET [Ralf_Doewich] [Ralf_Doewich]
optima-vnet 1051 udp Optima VNET [Ralf_Doewich] [Ralf_Doewich]

Contact Information

ID Name Organization Contact URI Last Updated
[Anders_Borg] Anders Borg mailto:anders.borg&solid.se 2004-11
[Bill_Carroll] Bill Carroll mailto:billc&xactlabs.com
[Chris_Ryland] Chris Ryland mailto:cpr&emsoftware.com 2004-11
[David_Anderson] David Anderson mailto:davea&ssl.berkeley.edu 2004-11
[Doug_Royer] Doug Royer mailto:DouglasRoyer&gmail.com 2010-12-09
[Franz_Josef_Leuders] Franz-Josef Leuders mailto:development&tobit.com
[Heiko_Schlichting] Heiko Schlichting mailto:heiko.schlichting&fu-berlin.de 2022-06-07
[IANA] IANA mailto:iana&iana.org
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[John_Eckert] John Eckert Valassis mailto:eckertj&valassis.com 2015-05-05
[Jonathan_A_Zdziaras] Jonathan A. Zdziaraski mailto:jonathan&nuclearelephant.com 2004-11
[Joseph_Geer] Joseph Geer mailto:jgeer&peapod.com
[Karl_Palsson] Karl Palsson mailto:karl_p&danfoss.com 2004-11
[Leif_Ekblad] Leif Ekblad mailto:leif&rdos.net
[Marc_Majka] Marc Majka mailto:majka&apple.com 2002-08
[Michael_Chapman] Michael Chapman mailto:mchapman&fortresstech.com 2004-11
[Paul_Whittemore] Paul Whittemore mailto:paul&softarc.com
[Ralf_Doewich] Ralf Doewich mailto:ralf.doewich&optimatele.com
[Ramy_Zaarour] Ramy Zaarour mailto:ramy&lumos.com
[Rohit_Garg] Rohit Garg mailto:rohit.garg&eng.sun.com
[Ronald_R_Ohmer] Ronald R. Ohmer mailto:rohmer&aisconsulting.net 2004-02
[Sandra_Vargas] Sandra Vargas mailto:Sandrama&microsoft.com 2003-03
[Sandy_Kronenberg] Sandy Kronenberg mailto:sandy&netarx.com 2008-04-03
[Steve_Ravida] Steve Ravida mailto:steve.ravida&nebulaholdings.com
[Steven_Fields] Steven Fields mailto:sfields&identix.com 2002-02
[Tim_Morgan] Tim Morgan mailto:timm&surfcontrol.com 2004-11
[Valassis] Valassis mailto:eckertj&valassis.com 2015-05-05
[Vera_Heinau] Vera Heinau mailto:vera.heinau&fu-berlin.de 2022-06-07