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
ns 760 udp
cadlock 770 tcp
cadlock 770 udp
wpgs 780 tcp [Josyula_R_Rao] [Josyula_R_Rao]
wpgs 780 udp [Josyula_R_Rao] [Josyula_R_Rao]
mdbs-daemon 800 tcp

IANA assigned this well-formed service name as a replacement for "mdbs_daemon".
mdbs_daemon 800 tcp This entry is an alias to "mdbs-daemon". This entry is now historic, not usable for use with many common service discovery mechanisms.
mdbs-daemon 800 udp

IANA assigned this well-formed service name as a replacement for "mdbs_daemon".
mdbs_daemon 800 udp This entry is an alias to "mdbs-daemon". This entry is now historic, not usable for use with many common service discovery mechanisms.
device 801 tcp
device 801 udp
mbap-s 802 tcp Modbus Application Protocol Secure [modbus.org] [Dennis_Dube] 2014-06-10
mbap-s 802 udp Modbus Application Protocol Secure [modbus.org] [Dennis_Dube] 2014-06-10
803-809 Unassigned
fcp-udp 810 tcp FCP [Paul_Whittemore] [Paul_Whittemore]
fcp-udp 810 udp FCP Datagram [Paul_Whittemore] [Paul_Whittemore]
netconf-ssh 830 tcp NETCONF over SSH [RFC6242]
netconf-ssh 830 udp NETCONF over SSH [RFC6242]
domain-s 853 udp DNS query-response protocol run over DTLS or QUIC [IESG] [IETF_Chair] 2015-10-08 2022-04-01 [RFC7858][RFC8094][RFC9250]
iscsi 860 tcp iSCSI [IESG] [IETF_Chair] 2013-08-27 [RFC7143]
iscsi 860 udp iSCSI [IESG] [IETF_Chair] 2013-08-27 [RFC7143]
omginitialrefs 900 tcp OMG Initial Refs [Christian_Callsen] [Christian_Callsen]
omginitialrefs 900 udp OMG Initial Refs [Christian_Callsen] [Christian_Callsen]
smpnameres 901 tcp SMPNAMERES [Leif_Ekblad] [Leif_Ekblad]
smpnameres 901 udp SMPNAMERES [Leif_Ekblad] [Leif_Ekblad]
ideafarm-door 902 tcp self documenting Telnet Door
ideafarm-door 902 udp self documenting Door: send 0x00 for info
ideafarm-panic 903 tcp self documenting Telnet Panic Door [Wo_o_Ideafarm] [Wo_o_Ideafarm]
ideafarm-panic 903 udp self documenting Panic Door: send 0x00 for info [Wo_o_Ideafarm] [Wo_o_Ideafarm]
904-909 Unassigned
kink 910 tcp Kerberized Internet Negotiation of Keys (KINK) [RFC4430]
kink 910 udp Kerberized Internet Negotiation of Keys (KINK) [RFC4430]
apex-edge 913 tcp APEX endpoint-relay service [RFC3340]
apex-edge 913 udp APEX endpoint-relay service [RFC3340]
ftps 990 tcp ftp protocol, control, over TLS/SSL [Christopher_Allen] [Christopher_Allen]
ftps 990 udp ftp protocol, control, over TLS/SSL [Christopher_Allen] [Christopher_Allen]
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]
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 2024-12-20 [RFC6335]
1023 udp Reserved 2024-12-20 [RFC6335]
1024 tcp Reserved 2024-12-20 [RFC6335]
1024 udp Reserved 2024-12-20 [RFC6335]
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

Contact Information

ID Name Organization Contact URI Last Updated
[Anders_Borg] Anders Borg mailto:anders.borg&solid.se 2004-11
[Chris_Ryland] Chris Ryland mailto:cpr&emsoftware.com 2004-11
[Christian_Callsen] Christian Callsen mailto:Christian.Callsen&eng.sun.com
[Christopher_Allen] Christopher Allen mailto:ChristopherA&consensus.com
[David_Anderson] David Anderson mailto:davea&ssl.berkeley.edu 2004-11
[Dennis_Dube] Dennis Dube mailto:dennis.dube&schneider-electric.com 2014-06-10
[Doug_Royer] Doug Royer mailto:DouglasRoyer&gmail.com 2010-12-09
[Heiko_Schlichting] Heiko Schlichting mailto:heiko.schlichting&fu-berlin.de 2022-06-07
[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
[Josyula_R_Rao] Josyula R. Rao mailto:jrrao&watson.ibm.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
[modbus.org] modbus.org mailto:rbelliardi&modbus.org 2014-06-10
[Paul_Whittemore] Paul Whittemore mailto:paul&softarc.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
[Wo_o_Ideafarm] Wo'o Ideafarm mailto:b85f3c23.9ad6f42c&ideafarm.com