Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-11-04
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| mpm | 45 | tcp | Message Processing Module [recv] | ||||||||
| mpm | 45 | udp | Message Processing Module [recv] | ||||||||
| sunrpc | 111 | tcp | SUN Remote Procedure Call | Chuck McManis | Chuck McManis | ||||||
| sunrpc | 111 | udp | SUN Remote Procedure Call | Chuck McManis | Chuck McManis | ||||||
| ulistproc | 372 | tcp | ListProcessor | Anastasios Kotsikonas | Anastasios Kotsikonas | ||||||
| ulistproc | 372 | udp | ListProcessor | Anastasios Kotsikonas | Anastasios Kotsikonas | ||||||
| exec | 512 | tcp | remote process execution; authentication performed using passwords and UNIX login names | ||||||||
| biff | 512 | udp | used by mail system to notify users of new mail received; currently receives messages only from processes on the same machine | ||||||||
| router | 520 | udp | local routing process (on site); uses variant of Xerox NS routing information protocol - RIP | ||||||||
| vdab | 1775 | tcp | data interchange between visual processing containers | MJA Technology LLC | Mark J. App | 2014-04-23 | |||||
| iec-104 | 2404 | tcp | IEC 60870-5-104 process control over IP | Walter K. Eichelburg | Walter K. Eichelburg | ||||||
| iec-104 | 2404 | udp | IEC 60870-5-104 process control over IP | Walter K. Eichelburg | Walter K. Eichelburg | ||||||
| sossecollector | 3166 | tcp | Quest Spotlight Out-Of-Process Collector | Greg Cottman | Greg Cottman | 2008-10-23 | |||||
| sossecollector | 3166 | udp | Quest Spotlight Out-Of-Process Collector | Greg Cottman | Greg Cottman | 2008-10-23 | |||||
| ffserver | 3825 | tcp | Antera FlowFusion Process Simulation | Armin Liebchen | Armin Liebchen | 2007-06 | |||||
| ffserver | 3825 | udp | Antera FlowFusion Process Simulation | Armin Liebchen | Armin Liebchen | 2007-06 | |||||
| roce | 4791 | udp | IP Routable RocE | InfiniBand Trade Association (IBTA) | Diego Crupnicoff (IBTA TWG Chair) | 2014-10-17 | |||||
| veroce | 4794 | udp | veRoCE Transport Protocol | ByteDance | Dai Huichen | 2026-03-06 | |||||
| gradecam | 5117 | tcp | GradeCam Image Processing | Robert Porter | Robert Porter | 2009-09-24 | |||||
| spc | 6111 | tcp | HP SoftBench Sub-Process Control | Scott A. Kramer | Scott A. Kramer | ||||||
| spc | 6111 | udp | HP SoftBench Sub-Process Control | Scott A. Kramer | Scott A. Kramer | ||||||
| dtspcd | 6112 | tcp | Desk-Top Sub-Process Control Daemon | Doug Royer | Doug Royer | 2010-12-08 | |||||
| dtspcd | 6112 | udp | Desk-Top Sub-Process Control Daemon | Doug Royer | Doug Royer | 2010-12-08 | |||||
| tipc | 6118 | udp | Transparent Inter Process Communication | Ericsson | Erik Hugne | 2012-09-05 | |||||
| thermo-calc | 6201 | udp | Management of service nodes in a processing grid for thermodynamic calculations | Thermo-Calc Software AB | Thomas Revesz | 2012-06-28 | |||||
| boe-processsvr | 6406 | Business Objects Enterprise internal server | SAP | Giriraj Harapanahalli | 2008-05-05 | 2026-05-27 | |||||
| afs3-bos | 7007 | tcp | basic overseer process | ||||||||
| afs3-bos | 7007 | udp | basic overseer process | ||||||||
| ccag-pib | 7169 | tcp | Consequor Consulting Process Integration Bridge | Frank Goenninger | Frank Goenninger | 2010-02-22 | |||||
| ccag-pib | 7169 | udp | Consequor Consulting Process Integration Bridge | Frank Goenninger | Frank Goenninger | 2010-02-22 | |||||
| acplt | 7509 | tcp | ACPLT - process automation service | The Chair for Process Control Engineering | Ulrich Epple | 2010-12-07 | 2012-08-07 | ||||
| trdp-pd | 17224 | udp | Train Realtime Data Protocol (TRDP) Process Data | IEC Central Office | Gianosvaldo Fadin | 2015-07-24 | |||||
| iec-104-sec | 19998 | tcp | IEC 60870-5-104 process control - secure | Grant Gilchrist | Grant Gilchrist | 2010-10-18 | |||||
| netspeak-cps | 21849 | tcp | NetSpeak Corp. Credit Processing System | Toby Hosterman | Toby Hosterman | ||||||
| netspeak-cps | 21849 | udp | NetSpeak Corp. Credit Processing System | Toby Hosterman | Toby Hosterman | ||||||
| t1distproc60 | 32249 | tcp | T1 Distributed Processor | Peter Beahan | Peter Beahan | 2004-11 | |||||
| t1distproc60 | 32249 | udp | T1 Distributed Processor | Peter Beahan | Peter Beahan | 2004-11 | |||||
| filenet-pa | 32772 | tcp | FileNET Process Analyzer | Chris Adkins | Chris Adkins | 2003-01 | |||||
| filenet-pa | 32772 | udp | FileNET Process Analyzer | Chris Adkins | Chris Adkins | 2003-01 | |||||
| secrmmsafecopya | 38865 | tcp | Security approval process for use of the secRMM SafeCopy program | Squadra Technologies | Anthony LaMark | 2012-03-14 | |||||
| sun-rpc | SUN Remote Procedure Call | ||||||||||
| accessdata-f2w | FTK2 Backend Processing Agent Service | Rick Russell | Rick Russell | Defined TXT keys: Proprietary | |||||||
| bhipc | tcp | Becker & Hickl Inter Process Communication | Becker & Hickl GmbH | Enzo Marscheck | 2023-02-15 | Defined TXT keys: None | |||||
| bhipc | udp | Becker & Hickl Inter Process Communication | Becker & Hickl GmbH | Enzo Marscheck | 2023-02-15 | Defined TXT keys: None | |||||
| compressnet | tcp | Management Utility/Compression Process | Bernie Volz | Bernie Volz | 2025-02-13 | Defined TXT keys: None | |||||
| compressnet | udp | Management Utility/Compression Process | Bernie Volz | Bernie Volz | 2025-02-13 | Defined TXT keys: None | |||||
| https | tcp | HTTP over SSL/TLS | Tim Berners-Lee | Tim Berners-Lee | Web browsers like Safari and Internet Explorer (with the Bonjour for Windows plugin) DO NOT browse for DNS-SD service type "_https._tcp" in addition to browsing for "_http._tcp". This is a conscious decision to reduce proliferation of service types, to help keep DNS-SD efficient on the network. Today, if a user types http://www.mybank.com/ into their web browser, the web server automatically redirects the user to https://www.mybank.com/. Rather than having an entirely different DNS-SD service type for https, we recommend using the same redirection mechanism: advertise a plain "http" service, which consists of nothing except an HTTP redirection to the desired "https" URL. Work is currently being done on adding mechanisms to HTTP and TLS to allow the server to tell the client that it needs to activate TLS on the current connection before proceeding. If this becomes widely adopted, it further justifies the decision to not create a separate DNS-SD service type "_https._tcp", because security becomes just another one of the things that is negotiated on a per-connection basis (like content-type negotiation today) rather than being an entirely separate thing. | ||||||
| nedap-aepu | tcp | Nedap AEOS processing unit | Nedap | Leon van der Voort van der Kleij | 2014-08-28 | Defined TXT keys: None | |||||
| socketcloud | Socketcloud distributed application framework | Robert Goodyear | Robert Goodyear | Defined TXT keys: system, service, process, context, direction, status, progress, health, directive, flags | |||||||
| stingray-rpc | tcp | Stingray Remote Procedure Call | IK SATPROF LLC | Sergey Zubov | 2014-05-02 | Defined TXT keys: None | |||||
| tzrpc | tcp | TZ-Software remote procedure call based synchronization protocol | Thomas Zwick | Thomas Zwick | 2011-10-12 | Defined TXT keys: Proprietary |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Anastasios Kotsikonas | tasos&cs.bu.edu | ||
| Anthony LaMark | Squadra Technologies | anthony&squadratechnologies.com | 2012-03-14 |
| Armin Liebchen | armin&anteradesign.com | 2007-06 | |
| Becker & Hickl GmbH | info&becker-hickl.com | 2023-02-15 | |
| Bernie Volz | volz&cisco.com | ||
| ByteDance | daihuichen&bytedance.com | 2026-03-06 | |
| The Chair for Process Control Engineering | ks&plt.rwth-aachen.de | 2012-08-07 | |
| Chris Adkins | cadkins&filenet.com | 2006-10 | |
| Chuck McManis | cmcmanis&freegate.net | ||
| Dai Huichen | daihuichen&bytedance.com | 2026-03-06 | |
| Diego Crupnicoff (IBTA TWG Chair) | diego&mellanox.com | 2014-10-17 | |
| Doug Royer | DouglasRoyer&gmail.com | 2010-12-09 | |
| Enzo Marscheck | Becker & Hickl GmbH | marscheck&becker-hickl.de | 2023-02-15 |
| Ericsson | erik.hugne&ericsson.com | 2012-09-05 | |
| Erik Hugne | Ericsson | erik.hugne&ericsson.com | 2012-09-05 |
| Frank Goenninger | frank.goenninger&consequor.de | 2010-02-22 | |
| Gianosvaldo Fadin | IEC Central Office | gianosvaldo.fadin&anie.it | 2015-07-24 |
| Giriraj Harapanahalli | giriraj.harapanahalli&sap.com | 2026-05-27 | |
| Grant Gilchrist | grant&enernex.com | 2010-10-18 | |
| Greg Cottman | greg.cottman&quest.com | 2008-10-23 | |
| IEC Central Office | cj&iec.ch | 2015-07-24 | |
| IK SATPROF LLC | reg&iksatprof.ru | 2014-05-02 | |
| InfiniBand Trade Association (IBTA) | administration&infinibandta.org | 2014-10-17 | |
| Leon van der Voort van der Kleij | Nedap | leon.vandervoortvanderkleij&nedap.com | 2014-08-28 |
| Mark J. App | MJA_Technology_LLC | mapp&vdabtec.com | 2020-02-03 |
| MJA Technology LLC | mapp&vdabtec.com | 2020-02-03 | |
| Nedap | leon.vandervoortvanderkleij&nedap.com | 2014-08-28 | |
| Peter Beahan | peter_beahan&technologyonecorp.com | 2004-11 | |
| Rick Russell | rrussell&accessdata.com | ||
| Robert Goodyear | robg&brand-up.com | ||
| Robert Porter | rob&gradecam.com | 2009-09-24 | |
| SAP | giriraj.harapanahalli&sap.com | 2026-05-27 | |
| Scott A. Kramer | sk&tleilaxu.sde.hp.com | ||
| Sergey Zubov | IK SATPROF LLC | sergey.zubov&iksatprof.ru | 2014-05-02 |
| Squadra Technologies | anthony&squadratechnologies.com | 2012-03-14 | |
| Thermo-Calc Software AB | thomasr&thermocalc.se | 2012-06-28 | |
| Thomas Revesz | Thermo-Calc Software AB | thomasr&thermocalc.se | 2012-06-28 |
| Thomas Zwick | thomas.zwick&tz-software.de | 2011-10-12 | |
| Tim Berners-Lee | timbl&w3.org | ||
| Toby Hosterman | root&netspeak.com | ||
| Ulrich Epple | ks&plt.rwth-aachen.de | 2012-08-07 | |
| Walter K. Eichelburg | walter.eichelburg&sat-automation.com |