Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-27
Expert(s)
- TCP/UDP: Joe Touch; Eliot Lear, Kumiko Ono, Wes Eddy, Brian Trammell, and Michael Scharf
- SCTP: Michael Tuexen
- DCCP: Eddie Kohler and Yoshifumi Nishida
Reference
- RFC 6335: Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry
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 basis, as described in RFC 6335.
Port numbers are divided into three ranges, with their uses and assignment procedures specified in Section 8.1.2 of RFC 6335:
- System Ports (0-1023) are assigned using the IETF Review or IESG Approval procedures.
- User Ports (1024-49151) are assigned using the IETF Review, IESG Approval, or Expert Review procedures.
- Dynamic and/or Private Ports (49152-65535) are not assigned.
The registration procedures for service names and port numbers are specified in RFC 6335, while the registration policies referenced above are defined in RFC 8126.
Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA registration.
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.
Registration Forms
- To request a new assignment, please use the Application for Service Names and User Port Numbers form.
- To modify an existing assignment, please use the Modify a Port Number Assignment form.
Available Formats
| Service Name | Port Number | Transport Protocol | Description | Assignee | Contact | Registration Date | Modification Date | Reference | Service Code | Unauthorized Use Reported | Assignment Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11110 | udp | Reserved | |||||||||
| 11209-11210 | Unassigned | ||||||||||
| edbsrvr | 12010 | tcp | ElevateDB Server | Tim Young | Tim Young | 2009-05-06 | |||||
| 12010 | udp | Reserved | |||||||||
| 12014-12108 | Unassigned | ||||||||||
| rets-ssl | 12109 | tcp | RETS over SSL | Jeremy Crawford | Jeremy Crawford | 2003-02 | |||||
| rets-ssl | 12109 | udp | RETS over SSL | Jeremy Crawford | Jeremy Crawford | 2003-02 | |||||
| 12110-12120 | Unassigned | ||||||||||
| pduncs | 16310 | tcp | Policy Distribute, Update Notification | Diane I. Shannon | Diane I. Shannon | 2006-08 | |||||
| pduncs | 16310 | udp | Policy Distribute, Update Notification | Diane I. Shannon | Diane I. Shannon | 2006-08 | |||||
| ncpu | 17010 | tcp | Plan 9 cpu port | Ronald G. Minnich | Ronald G. Minnich | 2022-05-13 | Defined TXT keys: u=username; k=keypattern; f=fstabFILE; n=namespace; h=hostkey; r=root | ||||
| 17010 | udp | Reserved | |||||||||
| isa100-gci | 17223 | tcp | ISA100 GCI is a service utilizing a common interface between an ISA100 Wireless gateway and a client application | ISA100 Wireless Compliance Institute | Jay Werb | 2015-07-24 | |||||
| 18001-18103 | Unassigned | ||||||||||
| radpdf | 18104 | tcp | RAD PDF Service | Christopher Truxaw | Christopher Truxaw | 2010-10-15 | |||||
| 18104 | udp | Reserved | |||||||||
| 18105-18135 | Unassigned | ||||||||||
| hp-sco | 19410 | tcp | hp-sco | Larry Schwartz | Larry Schwartz | ||||||
| hp-sco | 19410 | udp | hp-sco | Larry Schwartz | Larry Schwartz | ||||||
| iec-104-sec | 19998 | tcp | IEC 60870-5-104 process control - secure | Grant Gilchrist | Grant Gilchrist | 2010-10-18 | |||||
| crtech-nlm | 20810 | tcp | CRTech NLM | Cullimore And Ring Technologies | Dave Wilkins | 2021-06-24 | |||||
| 20810 | udp | Reserved | |||||||||
| irtrans | 21000 | tcp | IRTrans Control | Marcus Mueller | Marcus Mueller | 2004-11 | |||||
| irtrans | 21000 | udp | IRTrans Control | Marcus Mueller | Marcus Mueller | 2004-11 | |||||
| 21001-21009 | Unassigned | ||||||||||
| notezilla-lan | 21010 | tcp | Notezilla.Lan Server | Conceptworld Corporation | Gautam Jain | 2013-08-20 | |||||
| 21010 | udp | Reserved | |||||||||
| 21011-21211 | Unassigned | ||||||||||
| s102 | 23272 | udp | S102 application | Kimmo Kymalainen | Kimmo Kymalainen | 2009-08-26 | |||||
| icl-twobase10 | 25009 | tcp | icl-twobase10 | J. A. (Tony) Sever | J. A. (Tony) Sever | ||||||
| icl-twobase10 | 25009 | udp | icl-twobase10 | J. A. (Tony) Sever | J. A. (Tony) Sever | ||||||
| 25010-25099 | Unassigned | ||||||||||
| db2c-tls | 25100 | tcp | IBM Db2 Client Interface - Encrypted | IBM | Matthew Emmerton | 2024-03-05 | |||||
| 25100 | udp | Reserved | |||||||||
| 25101-25470 | Unassigned | ||||||||||
| flex-lm | 27000-27009 | FLEX LM (1-10) | Flexera Software | Paul Bland | 2018-02-15 | ||||||
| flex-lmadmin | 27010 | tcp | A protocol for managing license services | Flexera | Paul Bland | 2018-08-22 | |||||
| 27010 | udp | Reserved | |||||||||
| gruber-cashreg | 28010 | tcp | Gruber cash registry protocol | Gruber Schanksysteme | Clemens Gruber | 2019-12-31 | |||||
| 28010 | udp | Reserved | |||||||||
| rwp | 30100 | tcp | Remote Window Protocol | Maxim Baklanovsky | Maxim Baklanovsky | 2015-05-20 | |||||
| 30100 | udp | Reserved | |||||||||
| rwp | 30100 | sctp | Remote Window Protocol | Maxim Baklanovsky | Maxim Baklanovsky | 2015-05-20 | |||||
| 30101-30259 | Unassigned | ||||||||||
| 31000-31015 | Unassigned | ||||||||||
| ka-sddp | 31016 | tcp | Kollective Agent Secure Distributed Delivery Protocol | Kollective Technology Inc. | John Wainwright | 2016-12-11 | |||||
| ka-kdp | 31016 | udp | Kollective Agent Kollective Delivery Protocol | Kollective Technology Inc. | John Wainwright | 2016-12-11 | |||||
| 31017-31019 | Unassigned | ||||||||||
| autotrac-acp | 31020 | tcp | Autotrac ACP 245 | Roberto Jorge Dino | Roberto Jorge Dino | ||||||
| 31020 | udp | Reserved | |||||||||
| 31021-31028 | Unassigned | ||||||||||
| 31029 | tcp | Reserved | |||||||||
| yawn | 31029 | udp | YaWN - Yet Another Windows Notifier | David Spivey | David Spivey | 2010-08-30 | |||||
| 31030-31336 | Unassigned | ||||||||||
| 32802-32810 | Unassigned | ||||||||||
| axio-disc | 35100 | tcp | Axiomatic discovery protocol | Axiomatic Technologies Corporation | Oleksandr_Bogush | 2016-12-09 | |||||
| axio-disc | 35100 | udp | Axiomatic discovery protocol | Axiomatic Technologies Corporation | Oleksandr_Bogush | 2016-12-09 | |||||
| 35101-35353 | Unassigned | ||||||||||
| 36002-36410 | Unassigned | ||||||||||
| 40854-41110 | Unassigned | ||||||||||
| caerpc | 42510 | tcp | CA eTrust RPC | Jon Press | Jon Press | 2005-08 | |||||
| caerpc | 42510 | udp | CA eTrust RPC | Jon Press | Jon Press | 2005-08 | |||||
| shaperai | 43210 | tcp | Shaper Automation Server Management | Shaper Automation Inc. | Yohann Sulaiman | 2012-06-22 | |||||
| shaperai-disc | 43210 | udp | Shaper Automation Server Management Discovery | Shaper Automation Inc. | Yohann Sulaiman | 2012-06-22 | |||||
| jvl-mactalk | 47100 | udp | Configuration of motors connected to Industrial Ethernet | JVL Industri Elektronik | Kim Berthelsen | 2012-12-21 | |||||
| 47100 | tcp | Reserved | |||||||||
| 47101-47556 | Unassigned | ||||||||||
| 47810-47999 | Unassigned | ||||||||||
| help | HELP command | RFC 1078 | TCP Port Service Multiplexer (TCPMUX) | ||||||||
| hpr-bldlnx | HP Remote Build System for Linux-based Systems | Jeffrey J. Walls | Jeffrey J. Walls | Defined TXT keys: rh73, rhel3, rhel4, deb31, suse102 | |||||||
| hpr-toollnx | HP Remote System that houses compilers and tools for Linux-based Systems | Jeffrey J. Walls | Jeffrey J. Walls | Defined TXT keys: rh73, rhel3, rhel4, deb31, suse102 | |||||||
| hpr-tstlnx | HP Remote Test System for Linux-based Systems | Jeffrey J. Walls | Jeffrey J. Walls | Defined TXT keys: rh73, rhel3, rhel4, deb31, suse102 | |||||||
| presence | Peer-to-peer messaging / Link-Local Messaging | XMPP Registrar | XMPP Registrar | Defined TXT keys: See http://www.xmpp.org/registrar/linklocal.html Note: Registration updated May 2007. Was formerly listed as "iChat AV" (Apple's IM client for Mac OS X) with TXT keys: txtvers, port.p2pj, phsh, vc, 1st, AIM, msg, status, last When first shipped in Mac OS X 10.2, iChat's peer-to-peer messaging protocol was created to solve the problem of serverless messaging between peers on the same link. However, there is nothing inherent in the protocol that limits it to being only link-local; it was simply an artifact of iChat in Mac OS X 10.2 using link-local Multicast DNS to discover peers. With the advent of Wide-Area DNS-SD, it is also possible to use iChat's peer-to-peer messaging between machines on different links. | |||||||
| recipe-sharing | tcp | Recipe Sharing Protocol | Daniel G. Taylor | Daniel G. Taylor | 2007-11 | Defined TXT keys: http://www.recipemanager.org/rsp/rsp10draft.html#dnssd | |||||
| spx-hmp | tcp | SpinetiX HMP | SpinetiX S.A. | Diego Santa Cruz | 2011-10-18 | Defined TXT keys: txtvers=1 cport= the port for the content HTTP server (secondary HTTP server used for content publishing) mode= the mode in which the HMP device is currently operating, one of "normal", "safe" or "recovery" serial= serial number of the HMP device firmware= firmware version string (e.g., 2.1.0-0.1.7844) model= model string (e.g., HMP100) | |||||
| x510 | tcp | Security service to protocols | ITU-T Study Group 17 | Erik Andersen | 2019-08-13 | Defined TXT keys: None |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Axiomatic Technologies Corporation | obogush&axiomatic.com | 2016-12-09 | |
| Christopher Truxaw | ctruxaw&redsoftware.com | 2010-10-15 | |
| Clemens Gruber | iana&pqgruber.com | 2019-12-31 | |
| Conceptworld Corporation | admin&conceptworld.com | 2013-08-20 | |
| Cullimore And Ring Technologies | dave.wilkins&crtech.com | 2021-06-24 | |
| Daniel G. Taylor | dan&programmer-art.org | 2007-11 | |
| Dave Wilkins | dave.wilkins&crtech.com | 2021-06-24 | |
| David Spivey | DavidTSpivey&gmail.com | 2010-08-30 | |
| Diane I. Shannon | shannond&us.ibm.com | 2007-04 | |
| Diego Santa Cruz | SpinetiX S.A. | Diego.SantaCruz&spinetix.com | 2011-10-18 |
| Erik Andersen | era&x500.eu | 2019-08-13 | |
| Flexera | pbland&flexera.com | 2018-08-22 | |
| Flexera Software | security&flexerasoftware.com | 2016-07-19 | |
| Gautam Jain | Conceptworld Corporation | admin&conceptworld.com | 2013-08-20 |
| Grant Gilchrist | grant&enernex.com | 2010-10-18 | |
| Gruber Schanksysteme | iana&pqgruber.com | 2019-12-31 | |
| IBM | memmerto&ca.ibm.com | 2024-03-05 | |
| ISA100 Wireless Compliance Institute | jay&jwerb.com | 2015-07-24 | |
| ITU-T Study Group 17 | era&x500.eu | 2019-08-13 | |
| J. A. (Tony) Sever | J.A.Sever&bra0119.wins.icl.co.uk | ||
| Jay Werb | ISA100 Wireless Compliance Institute | jay&jwerb.com | 2015-07-24 |
| Jeffrey J. Walls | jeff.walls&hp.com | ||
| Jeremy Crawford | jeremy&reso.org | 2015-09-07 | |
| John Wainwright | jwainwright&kollective.com | 2016-12-11 | |
| Jon Press | IANA.Registions&ca.com | 2005-09 | |
| JVL Industri Elektronik | jvl&jvl.dk | 2012-12-21 | |
| Kim Berthelsen | JVL Industri Elektronik | kb&jvl.dk | 2012-12-21 |
| Kimmo Kymalainen | kimmo.kymalainen&etsi.org | 2017-05-08 | |
| Kollective Technology Inc. | info&kollective.com | 2016-12-11 | |
| Larry Schwartz | lrs&cup.hp.com | ||
| Marcus Mueller | marcus&irtrans.de | 2004-11 | |
| Matthew Emmerton | IBM | memmerto&ca.ibm.com | 2024-03-05 |
| Maxim Baklanovsky | m.baklanovsky&spbu.ru | 2015-05-20 | |
| Oleksandr_Bogush | obogush&axiomatic.com | 2016-12-09 | |
| Paul Bland | pbland&flexera.com | 2018-08-22 | |
| Roberto Jorge Dino | roberto.dino&autotrac.com.br | ||
| Ronald G. Minnich | rminnich&gmail.com | 2022-05-13 | |
| Shaper Automation Inc. | ports&shaperai.com | 2012-06-22 | |
| SpinetiX S.A. | Diego.SantaCruz&spinetix.com | 2011-10-18 | |
| Tim Young | timyoung&elevatesoft.com | 2009-05-06 | |
| XMPP Registrar | registrar&xmpp.org | ||
| Yohann Sulaiman | ports&shaperai.com | 2012-06-22 |