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
crs 507 udp crs [Brad_Wright] [Brad_Wright]
xvttp 508 tcp xvttp [Keith_J_Alphonso] [Keith_J_Alphonso]
xvttp 508 udp xvttp [Keith_J_Alphonso] [Keith_J_Alphonso]
snare 509 tcp snare [Dennis_Batchelder] [Dennis_Batchelder]
snare 509 udp snare [Dennis_Batchelder] [Dennis_Batchelder]
fcp 510 tcp FirstClass Protocol [Mike_Marshburn] [Mike_Marshburn]
fcp 510 udp FirstClass Protocol [Mike_Marshburn] [Mike_Marshburn]
efs 520 tcp extended file name server
router 520 udp local routing process (on site); uses variant of Xerox NS routing information protocol - RIP
courier 530 tcp rpc
courier 530 udp rpc
uucp 540 tcp uucpd
uucp 540 udp uucpd
dhcpv6-server 547 tcp DHCPv6 Server [IESG] [IETF_Chair] 2018-05-21 [RFC5460]
new-rwho 550 tcp new-who [n/a]
new-rwho 550 udp new-who [n/a]
rmonitor 560 tcp rmonitord
rmonitor 560 udp rmonitord
meter 570 tcp demon
meter 570 udp demon
sntp-heartbeat 580 tcp SNTP HEARTBEAT [Louis_Mamakos_2] [Louis_Mamakos_2]
sntp-heartbeat 580 udp SNTP HEARTBEAT [Louis_Mamakos_2] [Louis_Mamakos_2]
submission 587 tcp Message Submission 2011-11-17 [RFC6409]
submission 587 udp Message Submission 2011-11-17 [RFC6409]
tns-cml 590 tcp TNS CML [Jerome_Albin] [Jerome_Albin]
tns-cml 590 udp TNS CML [Jerome_Albin] [Jerome_Albin]
http-alt 591 tcp FileMaker, Inc. - HTTP Alternate (see Port 80) [Clay_Maeckel] [Clay_Maeckel]
http-alt 591 udp FileMaker, Inc. - HTTP Alternate (see Port 80) [Clay_Maeckel] [Clay_Maeckel]
ipcserver 600 tcp Sun IPC server [Bill_Schiefelbein] [Bill_Schiefelbein]
ipcserver 600 udp Sun IPC server [Bill_Schiefelbein] [Bill_Schiefelbein]
syslog-conn 601 tcp Reliable Syslog Service [RFC3195]
syslog-conn 601 udp Reliable Syslog Service [RFC3195]
xmlrpc-beep 602 tcp XML-RPC over BEEP [RFC3529]
xmlrpc-beep 602 udp XML-RPC over BEEP [RFC3529]
idxp 603 tcp IDXP [RFC4767]
idxp 603 udp IDXP [RFC4767]
tunnel 604 tcp TUNNEL [RFC3620]
tunnel 604 udp TUNNEL [RFC3620]
soap-beep 605 tcp SOAP over BEEP [RFC4227]
soap-beep 605 udp SOAP over BEEP [RFC4227]
urm 606 tcp Cray Unified Resource Manager
urm 606 udp Cray Unified Resource Manager
nqs 607 tcp nqs [Bill_Schiefelbein] [Bill_Schiefelbein]
nqs 607 udp nqs [Bill_Schiefelbein] [Bill_Schiefelbein]
sift-uft 608 tcp Sender-Initiated/Unsolicited File Transfer [Rick_Troth] [Rick_Troth]
sift-uft 608 udp Sender-Initiated/Unsolicited File Transfer [Rick_Troth] [Rick_Troth]
npmp-trap 609 tcp npmp-trap
npmp-trap 609 udp npmp-trap
npmp-local 610 tcp npmp-local
npmp-local 610 udp npmp-local
sco-websrvrmgr 620 tcp SCO WebServer Manager [Christopher_Durham] [Christopher_Durham]
sco-websrvrmgr 620 udp SCO WebServer Manager [Christopher_Durham] [Christopher_Durham]
rda 630 tcp RDA [John_Hadjioannou] [John_Hadjioannou]
rda 630 udp RDA [John_Hadjioannou] [John_Hadjioannou]
ipp 631 tcp IPP (Internet Printing Protocol) [IESG] [IETF_Chair] 2018-07-06 [RFC8011] Defined TXT keys: See BonjourPrinting.pdf.
ipp 631 udp IPP (Internet Printing Protocol) [IESG] [IETF_Chair] 2018-07-06 [RFC8011] Defined TXT keys: See BonjourPrinting.pdf.
ipps 631 tcp Internet Printing Protocol over HTTPS [IESG] [IETF_Chair] 2018-07-06 [RFC8011]
entrust-sps 640 tcp entrust-sps [Marek_Buchler] [Marek_Buchler]
entrust-sps 640 udp entrust-sps [Marek_Buchler] [Marek_Buchler]
obex 650 tcp OBEX [Jeff_Garbers] [Jeff_Garbers]
obex 650 udp OBEX [Jeff_Garbers] [Jeff_Garbers]
mac-srvr-admin 660 tcp MacOS Server Admin [Forest_Hill] [Forest_Hill]
mac-srvr-admin 660 udp MacOS Server Admin [Forest_Hill] [Forest_Hill]
vacdsm-sws 670 tcp VACDSM-SWS
vacdsm-sws 670 udp VACDSM-SWS
entrust-aaas 680 tcp entrust-aaas
entrust-aaas 680 udp entrust-aaas
vatp 690 tcp Velneo Application Transfer Protocol [Velneo] [David_Gutierrez] 2015-02-03
vatp 690 udp Velneo Application Transfer Protocol [Velneo] [David_Gutierrez] 2015-02-03
epp 700 tcp Extensible Provisioning Protocol [RFC5734]
epp 700 udp Extensible Provisioning Protocol [RFC5734]
lmp 701 tcp Link Management Protocol (LMP) [RFC4204]
lmp 701 udp Link Management Protocol (LMP) [RFC4204]
iris-beep 702 tcp IRIS over BEEP [RFC3983]
iris-beep 702 udp IRIS over BEEP [RFC3983]
703 Unassigned
elcsd 704 tcp errlog copy/server daemon
elcsd 704 udp errlog copy/server daemon
agentx 705 tcp AgentX [Bob_Natale] [Bob_Natale]
agentx 705 udp AgentX [Bob_Natale] [Bob_Natale]
silc 706 tcp SILC [Pekka_Riikonen] [Pekka_Riikonen]
silc 706 udp SILC [Pekka_Riikonen] [Pekka_Riikonen]
borland-dsj 707 tcp Borland DSJ [Gerg_Cole] [Gerg_Cole]
borland-dsj 707 udp Borland DSJ [Gerg_Cole] [Gerg_Cole]
708 Unassigned
entrust-kmsh 709 tcp Entrust Key Management Service Handler
entrust-kmsh 709 udp Entrust Key Management Service Handler
entrust-ash 710 tcp Entrust Administration Service Handler [Peter_Whittaker] [Peter_Whittaker]
entrust-ash 710 udp Entrust Administration Service Handler [Peter_Whittaker] [Peter_Whittaker]
netviewdm1 729 tcp IBM NetView DM/6000 Server/Client
netviewdm1 729 udp IBM NetView DM/6000 Server/Client
netviewdm2 730 tcp IBM NetView DM/6000 send/tcp
netviewdm2 730 udp IBM NetView DM/6000 send/tcp
netviewdm3 731 tcp IBM NetView DM/6000 receive/tcp [Philippe_Binet] [Philippe_Binet]
netviewdm3 731 udp IBM NetView DM/6000 receive/tcp [Philippe_Binet] [Philippe_Binet]
732-740 Unassigned
rfile 750 tcp
loadav 750 udp
kerberos-iv 750 udp kerberos version iv [Martin_Hamilton] [Martin_Hamilton]
ns 760 tcp
ns 760 udp

Contact Information

ID Name Organization Contact URI Last Updated
[Bill_Schiefelbein] Bill Schiefelbein mailto:schief&aspen.cray.com
[Bob_Natale] Bob Natale mailto:bob.natale&appliedsnmp.com
[Brad_Wright] Brad Wright mailto:bradwr&microsoft.com
[Christopher_Durham] Christopher Durham mailto:chrisdu&sco.com
[Clay_Maeckel] Clay Maeckel mailto:clay&claris.com 2023-09-12
[David_Gutierrez] David GutiƩrrez Velneo mailto:velneo&velneo.com 2015-02-03
[Dennis_Batchelder] Dennis Batchelder mailto:dennis&capres.com
[Forest_Hill] Forest Hill mailto:forest&apple.com
[Gerg_Cole] Gerg Cole mailto:gcole&corp.borland.com
[IESG] IESG mailto:iesg&ietf.org
[IETF_Chair] IETF Chair IETF mailto:chair&ietf.org
[Jeff_Garbers] Jeff Garbers mailto:FJG030&email.mot.com
[Jerome_Albin] Jerome Albin mailto:albin&taec.enet.dec.com
[John_Hadjioannou] John Hadjioannou mailto:john&minster.co.uk
[Keith_J_Alphonso] Keith J. Alphonso mailto:alphonso&ncs-ssc.com
[Louis_Mamakos_2] Louis Mamakos mailto:louie&uu.net
[Marek_Buchler] Marek Buchler mailto:Marek.Buchler&entrust.com
[Martin_Hamilton] Martin Hamilton mailto:martin&mrrl.lut.as.uk
[Mike_Marshburn] Mike Marshburn mailto:paul&softarc.com
[Pekka_Riikonen] Pekka Riikonen mailto:priikone&poseidon.pspt.fi
[Peter_Whittaker] Peter Whittaker mailto:pww&entrust.com
[Philippe_Binet] Philippe Binet mailto:phbinet&vnet.ibm.com
[Rick_Troth] Rick Troth mailto:troth&rice.edu
[Velneo] Velneo mailto:velneo&velneo.com