Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-22
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| gds-adppiw-db | 4550 | tcp | Perman I Interbase Server | Leo Lesage | Leo Lesage | 2006-04 | |||||
| gds-adppiw-db | 4550 | udp | Perman I Interbase Server | Leo Lesage | Leo Lesage | 2006-04 | |||||
| rsip | 4555 | tcp | RSIP Port | RFC 3103 | |||||||
| rsip | 4555 | udp | RSIP Port | RFC 3103 | |||||||
| 4560-4562 | Unassigned | ||||||||||
| deploymentmap | 4570 | tcp | Service to distribute and update within a site deployment information for Oracle Communications Suite | Oracle Corp. | Dan Newman | 2013-09-20 | |||||
| 4570 | udp | Reserved | |||||||||
| rid | 4590 | tcp | RID over HTTP/TLS | IESG | IETF Chair | RFC 6546 | |||||
| 4590 | udp | Reserved | |||||||||
| piranha1 | 4600 | tcp | Piranha1 | ||||||||
| piranha1 | 4600 | udp | Piranha1 | ||||||||
| piranha2 | 4601 | tcp | Piranha2 | Primark Corporation | Primark Corporation | ||||||
| piranha2 | 4601 | udp | Piranha2 | Primark Corporation | Primark Corporation | ||||||
| mtsserver | 4602 | tcp | EAX MTS Server | Pedro A Rodriguez | Pedro A Rodriguez | 2008-08-06 | |||||
| 4602 | udp | Reserved | |||||||||
| menandmice-upg | 4603 | tcp | Men & Mice Upgrade Agent | Eggert Thorlacius | Eggert Thorlacius | 2010-01-27 | |||||
| 4603 | udp | Reserved | |||||||||
| irp | 4604 | tcp | Identity Registration Protocol | Sixscape Communications, Pte. Ltd. | Lawrence E. Hughes | 2014-03-17 | 2014-08-26 | ||||
| 4604 | udp | Reserved | |||||||||
| sixchat | 4605 | tcp | Direct End to End Secure Chat Protocol | Sixscape Communications, Pte. Ltd. | Lawrence E. Hughes | 2014-09-11 | |||||
| 4605 | udp | Reserved | |||||||||
| sixid | 4606 | tcp | Secure ID to IP registration and lookup | Sixscape Communications, Pte. Ltd. | Lawrence E. Hughes | 2020-04-28 | |||||
| 4606 | udp | Reserved | |||||||||
| 4607-4620 | Unassigned | ||||||||||
| smaclmgr | 4660 | tcp | smaclmgr | Hiromi Taki | Hiromi Taki | ||||||
| smaclmgr | 4660 | udp | smaclmgr | Hiromi Taki | Hiromi Taki | ||||||
| light | 4670 | tcp | Light packets transfer protocol | Adam Golovenko | Adam Golovenko | 2006-10 | |||||
| light | 4670 | udp | Light packets transfer protocol | Adam Golovenko | Adam Golovenko | 2006-10 | |||||
| mgemanagement | 4680 | tcp | MGE UPS Management | Lecuivre J | Lecuivre J | 2005-08 | |||||
| mgemanagement | 4680 | udp | MGE UPS Management | Lecuivre J | Lecuivre J | 2005-08 | |||||
| rfid-rp1 | 4684 | tcp | RFID Reader Protocol 1.0 | Michael Mealling | Michael Mealling | 2005-08 | |||||
| rfid-rp1 | 4684 | udp | RFID Reader Protocol 1.0 | Michael Mealling | Michael Mealling | 2005-08 | |||||
| prelude | 4690 | tcp | Prelude IDS message proto | Yoann Vandoorselaere | Yoann Vandoorselaere | 2005-08 | |||||
| prelude | 4690 | udp | Prelude IDS message proto | Yoann Vandoorselaere | Yoann Vandoorselaere | 2005-08 | |||||
| netxms-agent | 4700 | tcp | NetXMS Agent | ||||||||
| netxms-agent | 4700 | udp | NetXMS Agent | ||||||||
| netxms-mgmt | 4701 | tcp | NetXMS Management | ||||||||
| netxms-mgmt | 4701 | udp | NetXMS Management | ||||||||
| netxms-sync | 4702 | tcp | NetXMS Server Synchronization | Victor Kirhenshtein | Victor Kirhenshtein | 2006-07 | |||||
| netxms-sync | 4702 | udp | NetXMS Server Synchronization | Victor Kirhenshtein | Victor Kirhenshtein | 2006-07 | |||||
| npqes-test | 4703 | tcp | Network Performance Quality Evaluation System Test Service | Zhengli | Zhengli | 2010-06-28 | |||||
| 4703 | udp | Reserved | |||||||||
| assuria-ins | 4704 | tcp | Assuria Insider | Nick Connor | Nick Connor | 2010-06-30 | |||||
| 4704 | udp | Reserved | |||||||||
| 4705-4710 | Unassigned | ||||||||||
| gearman | 4730 | tcp | Gearman Job Queue System | Eric Day | Eric Day | 2009-01-16 | |||||
| gearman | 4730 | udp | Gearman Job Queue System | Eric Day | Eric Day | 2009-01-16 | |||||
| ipfixs | 4740 | tcp | ipfix protocol over TLS | Nevil Brownlee | Nevil Brownlee | 2006-10 | |||||
| ipfixs | 4740 | sctp | ipfix protocol over DTLS | Nevil Brownlee | Nevil Brownlee | 2006-10 | |||||
| ipfixs | 4740 | udp | ipfix protocol over DTLS | Nevil Brownlee | Nevil Brownlee | 2006-10 | |||||
| ssad | 4750 | tcp | Simple Service Auto Discovery | Dr Horst Herb | Dr Horst Herb | 2005-12 | |||||
| ssad | 4750 | udp | Simple Service Auto Discovery | Dr Horst Herb | Dr Horst Herb | 2005-12 | |||||
| gre-in-udp | 4754 | udp | GRE-in-UDP Encapsulation | IESG | IETF Chair | 2016-10-05 | RFC 8086 | ||||
| gre-udp-dtls | 4755 | udp | GRE-in-UDP Encapsulation with DTLS | IESG | IETF Chair | 2016-10-05 | RFC 8086 | ||||
| xmcp | 4788 | tcp | eXtensible Messaging Client Protocol | Cisco | Glenn Matthews | 2011-05-23 | 2011-10-25 | Defined TXT keys: txtvers=1 (as described in the draft) protovers=<comma-separated list of major/minor versions supported> (examples: "protovers=1.0" "protovers=1.1,2.0" | |||
| vxlan-gpe | 4790 | udp | Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN) | Lawrence Kreeger | Lawrence Kreeger | 2014-08-26 | |||||
| 4790 | tcp | Reserved | |||||||||
| iims | 4800 | tcp | Icona Instant Messenging System | ||||||||
| iims | 4800 | udp | Icona Instant Messenging System | ||||||||
| iwec | 4801 | tcp | Icona Web Embedded Chat | ||||||||
| iwec | 4801 | udp | Icona Web Embedded Chat | ||||||||
| ilss | 4802 | tcp | Icona License System Server | Paul Stephen Borlie | Paul Stephen Borlie | ||||||
| ilss | 4802 | udp | Icona License System Server | Paul Stephen Borlie | Paul Stephen Borlie | ||||||
| notateit | 4803 | tcp | Notateit Messaging | ||||||||
| notateit-disc | 4803 | udp | Notateit Messaging Discovery | Ean Black | Ean Black | 2009-04-08 | |||||
| 4804 | tcp | Reserved | |||||||||
| aja-ntv4-disc | 4804 | udp | AJA ntv4 Video System Discovery | Mike Bernadett | Mike Bernadett | 2010-06-03 | |||||
| 4805-4826 | Unassigned | ||||||||||
| varadero-0 | 4837 | tcp | Varadero-0 | ||||||||
| varadero-0 | 4837 | udp | Varadero-0 | ||||||||
| opcua-tcp | 4840 | tcp | OPC UA Connection Protocol | OPC Foundation | Randy Armstrong | 2018-01-04 | |||||
| opcua-udp | 4840 | udp | OPC UA Multicast Datagram Protocol | OPC Foundation | Randy Armstrong | 2006-09 | 2018-01-04 | ||||
| sun-as-nodeagt | 4850 | tcp | Sun App Server - NA | Kedar Mhaswade | Kedar Mhaswade | 2004-11 | |||||
| sun-as-nodeagt | 4850 | udp | Sun App Server - NA | Kedar Mhaswade | Kedar Mhaswade | 2004-11 | |||||
| cc-tracking | 4870 | tcp | Citcom Tracking Service | Wolfgang Weidner | Wolfgang Weidner | 2005-12 | |||||
| cc-tracking | 4870 | udp | Citcom Tracking Service | Wolfgang Weidner | Wolfgang Weidner | 2005-12 | |||||
| hislip | 4880 | tcp | IVI High-Speed LAN Instrument Protocol | Interchangeable Virtual Instruments Foundation, Inc. | Larry Ostheimer | 2021-05-06 | |||||
| 4880 | udp | Reserved | |||||||||
| 4890-4893 | Unassigned | ||||||||||
| hfcs | 4900 | tcp | HFSQL Client/Server Database Engine | PC SOFT | Jerome AERTS | 2006-03-02 | 2014-02-02 | ||||
| hfcs | 4900 | udp | HFSQL Client/Server Database Engine | PC SOFT | Jerome AERTS | 2006-03-02 | 2014-02-02 | ||||
| flr-agent | 4901 | tcp | FileLocator Remote Search Agent IANA assigned this well-formed service name as a replacement for "flr_agent". |
David Vest | David Vest | 2008-11-19 | |||||
| flr_agent | 4901 | tcp | FileLocator Remote Search Agent | David Vest | David Vest | 2008-11-19 | This entry is an alias to "flr-agent". This entry is now historic, not usable for use with many common service discovery mechanisms. | ||||
| 4901 | udp | Reserved | |||||||||
| magiccontrol | 4902 | tcp | magicCONROL RF and Data Interface | Andreas Spalenski | Andreas Spalenski | 2008-11-24 | |||||
| 4902 | udp | Reserved | |||||||||
| 4903-4911 | Unassigned | ||||||||||
| fmsg | 4930 | tcp | Host-to-host messaging | FMSG AI PTY LTD | Mark Mennell | 2026-10-15 | |||||
| 4930 | udp | Reserved | |||||||||
| eq-office-4940 | 4940 | tcp | Equitrac Office | ||||||||
| eq-office-4940 | 4940 | udp | Equitrac Office | ||||||||
| sybasesrvmon | 4950 | tcp | Sybase Server Monitor | Chris Irie | Chris Irie | 2008-03-26 | |||||
| sybasesrvmon | 4950 | udp | Sybase Server Monitor | Chris Irie | Chris Irie | 2008-03-26 | |||||
| ccss-qsm | 4970 | tcp | CCSS QSystemMonitor | David Young | David Young | 2006-01 | |||||
| ccss-qsm | 4970 | udp | CCSS QSystemMonitor | David Young | David Young | 2006-01 | |||||
| ctxs-vpp | 4980 | udp | Citrix Virtual Path | Citrix Systems | Rohith Ramkumar | 2015-04-17 | |||||
| 4980 | tcp | Reserved | |||||||||
| busycal | 4990 | tcp | BusySync Calendar Synch. Protocol | David Riggle | David Riggle | 2008-01-07 | Defined TXT keys: Proprietary | ||||
| busycal | 4990 | udp | BusySync Calendar Synch. Protocol | David Riggle | David Riggle | 2008-01-07 | Defined TXT keys: Proprietary | ||||
| commplex-main | 5000 | tcp | |||||||||
| commplex-main | 5000 | udp |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Adam Golovenko | golovenko&gmail.com | 2006-10 | |
| Andreas Spalenski | andreas.spalenski&trsystems.de | 2008-11-24 | |
| Chris Irie | irie&sybase.com | 2008-03-26 | |
| Cisco | glenn.matthews&cisco.com | 2011-10-25 | |
| Citrix Systems | CloudBridge-PM&citrix.com | 2015-04-17 | |
| Dan Newman | Oracle Corp. | dan.c.newman&oracle.com | 2013-09-20 |
| David Riggle | dave&busymac.com | 2008-01-07 | |
| David Vest | dave&mythicsoft.com | 2008-11-19 | |
| David Young | david.young&ccsseurope.co.uk | 2006-01 | |
| Dr Horst Herb | horst&dorrigomedical.com | 2005-12 | |
| Ean Black | eanb&bladesoftware.co.uk | 2009-04-08 | |
| Eggert Thorlacius | eggi&menandmice.com | 2010-01-27 | |
| Eric Day | eday&oddments.org | 2009-01-16 | |
| FMSG AI PTY LTD | mark&fmsg.ai | 2026-10-15 | |
| Glenn Matthews | glenn.matthews&cisco.com | 2011-05-23 | |
| Hiromi Taki | stg-togo&saint.nm.fujitsu.co.jp | ||
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| Interchangeable Virtual Instruments Foundation, Inc. | ivi.contact&ivifoundation.org | 2021-05-06 | |
| Jerome AERTS | PC SOFT | jae&pcsoft.fr | 2014-02-02 |
| Kedar Mhaswade | kedar.Mhaswade&sun.com | 2004-11 | |
| Larry Ostheimer | larry_ostheimer&keysight.com | 2021-05-06 | |
| Lawrence E. Hughes | Sixscape Communications, Ltd. | lhughes&sixscape.com | 2014-03-17 |
| Lawrence Kreeger | kreeger&cisco.com | 2013-04-19 | |
| Lecuivre J | software.team&mgeups.com | 2005-08 | |
| Leo Lesage | leo.lesage&adp.nl | 2006-04 | |
| Mark Mennell | mark&fmsg.ai | 2026-10-15 | |
| Michael Mealling | michael&refactored-networks.com | 2005-08 | |
| Mike Bernadett | mjbernadett&sbcglobal.net | 2010-06-03 | |
| Nevil Brownlee | n.brownlee&auckland.ac.nz | 2006-10 | |
| Nick Connor | nickc&assuria.com | 2010-06-30 | |
| OPC Foundation | tcb&opcfoundation.org | 2017-05-23 | |
| Oracle Corp. | dan.c.newman&oracle.com | 2013-09-20 | |
| Paul Stephen Borlie | paul&icona.it | ||
| PC SOFT | jae&pcsoft.fr | 2014-02-02 | |
| Pedro A Rodriguez | pedro.rdz&eaxtechnologies.com.mx | 2008-08-06 | |
| Primark Corporation | joe.boone&primark.com | ||
| Randy Armstrong | tcb&opcfoundation.org | 2017-05-23 | |
| Rohith Ramkumar | Citrix Systems | CloudBridge-PM&citrix.com | 2015-04-17 |
| Sixscape Communications, Pte. Ltd. | lhughes&sixscape.com | 2014-08-26 | |
| Victor Kirhenshtein | victor&opticom.lv | 2006-07 | |
| Wolfgang Weidner | ww&citcom.de | 2005-12 | |
| Yoann Vandoorselaere | yoann&prelude-ids.org | 2005-08 | |
| Zhengli | std&iwncomm.com | 2010-06-28 |