Service Name and Transport Protocol Port Number Registry

Last Updated
2025-10-22
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]

Available Formats

CSV

XML

HTML

Plain text
Service Name Port Number Transport Protocol Description Assignee Contact Registration Date Modification Date Reference Service Code Unauthorized Use Reported Assignment Notes
ibm-wrless-lan 1461 tcp IBM Wireless LAN

IANA assigned this well-formed service name as a replacement for "ibm_wrless_lan".
[flanne] [flanne]
ibm_wrless_lan 1461 tcp IBM Wireless LAN [flanne] [flanne] This entry is an alias to "ibm-wrless-lan". This entry is now historic, not usable for use with many common service discovery mechanisms.
ibm-wrless-lan 1461 udp IBM Wireless LAN

IANA assigned this well-formed service name as a replacement for "ibm_wrless_lan".
[flanne] [flanne]
ibm_wrless_lan 1461 udp IBM Wireless LAN [flanne] [flanne] This entry is an alias to "ibm-wrless-lan". This entry is now historic, not usable for use with many common service discovery mechanisms.
world-lm 1462 tcp World License Manager [Michael_S_Amirault] [Michael_S_Amirault]
world-lm 1462 udp World License Manager [Michael_S_Amirault] [Michael_S_Amirault]
nucleus 1463 tcp Nucleus [Venky_Nagar] [Venky_Nagar]
nucleus 1463 udp Nucleus [Venky_Nagar] [Venky_Nagar]
msl-lmd 1464 tcp MSL License Manager

IANA assigned this well-formed service name as a replacement for "msl_lmd".
[Matt_Timmermans] [Matt_Timmermans]
msl_lmd 1464 tcp MSL License Manager [Matt_Timmermans] [Matt_Timmermans] This entry is an alias to "msl-lmd". This entry is now historic, not usable for use with many common service discovery mechanisms.
msl-lmd 1464 udp MSL License Manager

IANA assigned this well-formed service name as a replacement for "msl_lmd".
[Matt_Timmermans] [Matt_Timmermans]
msl_lmd 1464 udp MSL License Manager [Matt_Timmermans] [Matt_Timmermans] This entry is an alias to "msl-lmd". This entry is now historic, not usable for use with many common service discovery mechanisms.
pipes 1465 tcp Pipes Platform [Mark_Farlin] [Mark_Farlin]
pipes 1465 udp Pipes Platform [Mark_Farlin] [Mark_Farlin]
oceansoft-lm 1466 tcp Ocean Software License Manager [Randy_Leonard] [Randy_Leonard]
oceansoft-lm 1466 udp Ocean Software License Manager [Randy_Leonard] [Randy_Leonard]
csdmbase 1467 tcp CSDMBASE
csdmbase 1467 udp CSDMBASE
csdm 1468 tcp CSDM [Robert_Stabl] [Robert_Stabl]
csdm 1468 udp CSDM [Robert_Stabl] [Robert_Stabl]
aal-lm 1469 tcp Active Analysis Limited License Manager [David_Snocken] [David_Snocken]
aal-lm 1469 udp Active Analysis Limited License Manager [David_Snocken] [David_Snocken]
clvm-cfg 1476 tcp clvm-cfg [Eric_Soderberg] [Eric_Soderberg]
clvm-cfg 1476 udp clvm-cfg [Eric_Soderberg] [Eric_Soderberg]
nms-topo-serv 1486 tcp nms_topo_serv

IANA assigned this well-formed service name as a replacement for "nms_topo_serv".
[Sylvia_Siu] [Sylvia_Siu]
nms_topo_serv 1486 tcp nms_topo_serv [Sylvia_Siu] [Sylvia_Siu] This entry is an alias to "nms-topo-serv". This entry is now historic, not usable for use with many common service discovery mechanisms.
nms-topo-serv 1486 udp nms_topo_serv

IANA assigned this well-formed service name as a replacement for "nms_topo_serv".
[Sylvia_Siu] [Sylvia_Siu]
nms_topo_serv 1486 udp nms_topo_serv [Sylvia_Siu] [Sylvia_Siu] This entry is an alias to "nms-topo-serv". This entry is now historic, not usable for use with many common service discovery mechanisms.
liberty-lm 1496 tcp liberty-lm [Jim_Rogers] [Jim_Rogers]
liberty-lm 1496 udp liberty-lm [Jim_Rogers] [Jim_Rogers]
utcd 1506 tcp Universal Time daemon (utcd) [Walter_Poxon] [Walter_Poxon]
utcd 1506 udp Universal Time daemon (utcd) [Walter_Poxon] [Walter_Poxon]
vpad 1516 tcp Virtual Places Audio data
vpad 1516 udp Virtual Places Audio data
pdap-np 1526 tcp Prospero Data Access Prot non-priv [B_Clifford_Neuman] [B_Clifford_Neuman]
pdap-np 1526 udp Prospero Data Access Prot non-priv [B_Clifford_Neuman] [B_Clifford_Neuman]
ampr-inter 1536 tcp ampr-inter [Rob_Janssen] [Rob_Janssen]
ampr-inter 1536 udp ampr-inter [Rob_Janssen] [Rob_Janssen]
abbaccuray 1546 tcp abbaccuray [John_Wendt] [John_Wendt]
abbaccuray 1546 udp abbaccuray [John_Wendt] [John_Wendt]
veritas-pbx 1556 tcp VERITAS Private Branch Exchange

IANA assigned this well-formed service name as a replacement for "veritas_pbx".
[Stefan_Winkel] [Stefan_Winkel] 2004-04
veritas_pbx 1556 tcp VERITAS Private Branch Exchange [Stefan_Winkel] [Stefan_Winkel] 2004-04 This entry is an alias to "veritas-pbx". This entry is now historic, not usable for use with many common service discovery mechanisms.
veritas-pbx 1556 udp VERITAS Private Branch Exchange

IANA assigned this well-formed service name as a replacement for "veritas_pbx".
[Stefan_Winkel] [Stefan_Winkel] 2004-04
veritas_pbx 1556 udp VERITAS Private Branch Exchange [Stefan_Winkel] [Stefan_Winkel] 2004-04 This entry is an alias to "veritas-pbx". This entry is now historic, not usable for use with many common service discovery mechanisms.
asci-val 1560 tcp ASCI-RemoteSHADOW [Benjamin_Rosenberg] [Benjamin_Rosenberg]
asci-val 1560 udp ASCI-RemoteSHADOW [Benjamin_Rosenberg] [Benjamin_Rosenberg]
facilityview 1561 tcp facilityview [Ed_Green] [Ed_Green]
facilityview 1561 udp facilityview [Ed_Green] [Ed_Green]
pconnectmgr 1562 tcp pconnectmgr [Bob_Kaiser] [Bob_Kaiser]
pconnectmgr 1562 udp pconnectmgr [Bob_Kaiser] [Bob_Kaiser]
cadabra-lm 1563 tcp Cadabra License Manager [Arthur_Castonguay] [Arthur_Castonguay]
cadabra-lm 1563 udp Cadabra License Manager [Arthur_Castonguay] [Arthur_Castonguay]
pay-per-view 1564 tcp Pay-Per-View [Brian_Tung] [Brian_Tung]
pay-per-view 1564 udp Pay-Per-View [Brian_Tung] [Brian_Tung]
winddlb 1565 tcp WinDD [Kelly_Sims] [Kelly_Sims]
winddlb 1565 udp WinDD [Kelly_Sims] [Kelly_Sims]
corelvideo 1566 tcp CORELVIDEO [Ming_Poon] [Ming_Poon]
corelvideo 1566 udp CORELVIDEO [Ming_Poon] [Ming_Poon]
jlicelmd 1567 tcp jlicelmd [Christian_Schormann] [Christian_Schormann]
jlicelmd 1567 udp jlicelmd [Christian_Schormann] [Christian_Schormann]
tsspmap 1568 tcp tsspmap [Paul_W_Nelson] [Paul_W_Nelson]
tsspmap 1568 udp tsspmap [Paul_W_Nelson] [Paul_W_Nelson]
ets 1569 tcp ets [Carstein_Seeberg] [Carstein_Seeberg]
ets 1569 udp ets [Carstein_Seeberg] [Carstein_Seeberg]
moldflow-lm 1576 tcp Moldflow License Manager [Lech_Laskowski] [Lech_Laskowski]
moldflow-lm 1576 udp Moldflow License Manager [Lech_Laskowski] [Lech_Laskowski]
ibm-abtact 1586 tcp ibm-abtact [Sandeep_K_Singhal] [Sandeep_K_Singhal]
ibm-abtact 1586 udp ibm-abtact [Sandeep_K_Singhal] [Sandeep_K_Singhal]
radio-sm 1596 tcp radio-sm
radio-bc 1596 udp radio-bc [Ken_Chapman] [Ken_Chapman]
issd 1600 tcp issd
issd 1600 udp issd
aas 1601 tcp aas [Bob_Beard] [Bob_Beard]
aas 1601 udp aas [Bob_Beard] [Bob_Beard]
inspect 1602 tcp inspect [Frank_O_Neill] [Frank_O_Neill]
inspect 1602 udp inspect [Frank_O_Neill] [Frank_O_Neill]
picodbc 1603 tcp pickodbc [John_Lombardo] [John_Lombardo]
picodbc 1603 udp pickodbc [John_Lombardo] [John_Lombardo]
icabrowser 1604 tcp icabrowser [Brad_Pedersen] [Brad_Pedersen]
icabrowser 1604 udp icabrowser [Brad_Pedersen] [Brad_Pedersen]
slp 1605 tcp Salutation Manager (Salutation Protocol)
slp 1605 udp Salutation Manager (Salutation Protocol)
slm-api 1606 tcp Salutation Manager (SLM-API) [Tohru_Mori] [Tohru_Mori]
slm-api 1606 udp Salutation Manager (SLM-API) [Tohru_Mori] [Tohru_Mori]
stt 1607 tcp stt [Ryan_Bolz] [Ryan_Bolz]
stt 1607 udp stt [Ryan_Bolz] [Ryan_Bolz]
smart-lm 1608 tcp Smart Corp. License Manager [Connie_Qiu] [Connie_Qiu]
smart-lm 1608 udp Smart Corp. License Manager [Connie_Qiu] [Connie_Qiu]
isysg-lm 1609 tcp isysg-lm [Adam_Curtin] [Adam_Curtin]
isysg-lm 1609 udp isysg-lm [Adam_Curtin] [Adam_Curtin]
taurus-wh 1610 tcp taurus-wh [Jeff_Moffatt] [Jeff_Moffatt]
taurus-wh 1610 udp taurus-wh [Jeff_Moffatt] [Jeff_Moffatt]
ill 1611 tcp Inter Library Loan [Niall_Murphy] [Niall_Murphy]
ill 1611 udp Inter Library Loan [Niall_Murphy] [Niall_Murphy]
netbill-trans 1612 tcp NetBill Transaction Server
netbill-trans 1612 udp NetBill Transaction Server
netbill-keyrep 1613 tcp NetBill Key Repository
netbill-keyrep 1613 udp NetBill Key Repository
netbill-cred 1614 tcp NetBill Credential Server
netbill-cred 1614 udp NetBill Credential Server
netbill-auth 1615 tcp NetBill Authorization Server

Contact Information

ID Name Contact URI Last Updated
[Adam_Curtin] Adam Curtin mailto:adam.curtin&isysg.com
[Arthur_Castonguay] Arthur Castonguay mailto:arthurc&doe.carleton.ca
[B_Clifford_Neuman] B. Clifford Neuman mailto:bcn&isi.edu 2022-02-18
[Benjamin_Rosenberg] Benjamin Rosenberg mailto:brosenberg&advsyscon.com
[Bob_Beard] Bob Beard mailto:bobb&lachman.com
[Bob_Kaiser] Bob Kaiser mailto:BKaiser&palindrome.com
[Brad_Pedersen] Brad Pedersen mailto:bradp&citrix.com
[Brian_Tung] Brian Tung mailto:brian&isi.edu
[Carstein_Seeberg] Carstein Seeberg mailto:case&boole.no
[Christian_Schormann] Christian Schormann mailto:100410.3063&compuserve.com
[Connie_Qiu] Connie Qiu mailto:connie&scdb.com
[David_Snocken] David Snocken tel:+44-71-437-7009
[Ed_Green] Ed Green mailto:egreen&pmeasuring.com
[Eric_Soderberg] Eric Soderberg mailto:seric&cup.hp.com
[Frank_O_Neill] Frank O'Neill mailto:frank&morse.ilo.dec.com
[Jeff_Moffatt] Jeff Moffatt mailto:jeff&taurus.com
[Jim_Rogers] Jim Rogers mailto:trane!jimbo&pacbell.com
[John_Lombardo] John Lombardo mailto:johnl&picksys.com
[John_Wendt] John Wendt tel:+1-614-261-2000
[Kelly_Sims] Kelly Sims mailto:kellys&garnet.wv.tek.com
[Ken_Chapman] Ken Chapman mailto:kchapman&isis.com
[Lech_Laskowski] Lech Laskowski mailto:lech_laskowski&moldflow.com
[Mark_Farlin] Mark Farlin mailto:mfarlin&peerlogic.com
[Matt_Timmermans] Matt Timmermans
[Michael_S_Amirault] Michael S Amirault mailto:ambi&world.std.com
[Ming_Poon] Ming Poon mailto:mingp&corel.ca
[Niall_Murphy] Niall Murphy mailto:niallm&orca.ucd.ie
[Paul_W_Nelson] Paul W. Nelson mailto:nelson&thursby.com
[Randy_Leonard] Randy Leonard mailto:randy&oceansoft.com
[Rob_Janssen] Rob Janssen mailto:rob&sys3.pe1chl.ampr.org
[Robert_Stabl] Robert Stabl mailto:stabl&informatik.uni-muenchen.de
[Ryan_Bolz] Ryan Bolz mailto:ryanbo&microsoft.com
[Sandeep_K_Singhal] Sandeep K. Singhal mailto:singhal&cs.stanford.edu
[Stefan_Winkel] Stefan Winkel mailto:stefan&veritas.com 2004-04
[Sylvia_Siu] Sylvia Siu mailto:Sylvia_Siu&novell.co
[Tohru_Mori] Tohru Mori mailto:tmori&vnet.ibm.com
[Venky_Nagar] Venky Nagar mailto:venky&fafner.stanford.edu
[Walter_Poxon] Walter Poxon mailto:wdp&ironwood.cray.com
[flanne] mailto:flanne&vnet.IBM.COM