Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-15
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| quicksuite | 2900 | tcp | QUICKSUITE | William Egge | William Egge | ||||||
| quicksuite | 2900 | udp | QUICKSUITE | William Egge | William Egge | ||||||
| allstorcns | 2901 | tcp | ALLSTORCNS | Steve Dobson | Steve Dobson | ||||||
| allstorcns | 2901 | udp | ALLSTORCNS | Steve Dobson | Steve Dobson | ||||||
| netaspi | 2902 | tcp | NET ASPI | Johnson Luo | Johnson Luo | ||||||
| netaspi | 2902 | udp | NET ASPI | Johnson Luo | Johnson Luo | ||||||
| suitcase | 2903 | tcp | SUITCASE | Milton E. Sagen | Milton E. Sagen | ||||||
| suitcase | 2903 | udp | SUITCASE | Milton E. Sagen | Milton E. Sagen | ||||||
| m2ua | 2904 | tcp | M2UA | Lyndon Ong | Lyndon Ong | ||||||
| m2ua | 2904 | udp | M2UA | Lyndon Ong | Lyndon Ong | ||||||
| m2ua | 2904 | sctp | M2UA | Lyndon Ong | Lyndon Ong | ||||||
| m3ua | 2905 | tcp | M3UA | Lyndon Ong | Lyndon Ong | RFC 4666 | |||||
| 2905 | udp | De-registered | 2001-06-07 | ||||||||
| m3ua | 2905 | sctp | M3UA | Lyndon Ong | Lyndon Ong | RFC 4666 | |||||
| caller9 | 2906 | tcp | CALLER9 | Shams Naqi | Shams Naqi | ||||||
| caller9 | 2906 | udp | CALLER9 | Shams Naqi | Shams Naqi | ||||||
| webmethods-b2b | 2907 | tcp | WEBMETHODS B2B | Joseph Hines | Joseph Hines | ||||||
| webmethods-b2b | 2907 | udp | WEBMETHODS B2B | Joseph Hines | Joseph Hines | ||||||
| mao | 2908 | tcp | mao | Marc Baudoin | Marc Baudoin | ||||||
| mao | 2908 | udp | mao | Marc Baudoin | Marc Baudoin | ||||||
| funk-dialout | 2909 | tcp | Funk Dialout | Cimarron Boozer | Cimarron Boozer | ||||||
| funk-dialout | 2909 | udp | Funk Dialout | Cimarron Boozer | Cimarron Boozer | ||||||
| boscap | 2990 | tcp | BOSCAP | Dirk Hillbrecht | Dirk Hillbrecht | ||||||
| boscap | 2990 | udp | BOSCAP | Dirk Hillbrecht | Dirk Hillbrecht | ||||||
| stss | 3090 | tcp | Senforce Session Services | Peter Boucher | Peter Boucher | ||||||
| stss | 3090 | udp | Senforce Session Services | Peter Boucher | Peter Boucher | ||||||
| itu-bicc-stc | 3097 | sctp | ITU-T Q.1902.1/Q.2150.3 | Greg Sidebottom | Greg Sidebottom | ||||||
| csvr-proxy | 3190 | tcp | ConServR Proxy | ||||||||
| csvr-proxy | 3190 | udp | ConServR Proxy | ||||||||
| caps-lm | 3290 | tcp | CAPS LOGISTICS TOOLKIT - LM | Joseph Krebs | Joseph Krebs | ||||||
| caps-lm | 3290 | udp | CAPS LOGISTICS TOOLKIT - LM | Joseph Krebs | Joseph Krebs | ||||||
| dsc | 3390 | tcp | Distributed Service Coordinator | Charles Honton | Charles Honton | ||||||
| dsc | 3390 | udp | Distributed Service Coordinator | Charles Honton | Charles Honton | ||||||
| colubris | 3490 | tcp | Colubris Management Port | Gilbert Moineau | Gilbert Moineau | 2002-05 | |||||
| colubris | 3490 | udp | Colubris Management Port | Gilbert Moineau | Gilbert Moineau | 2002-05 | |||||
| wv-csp-sms | 3590 | tcp | WV CSP SMS Binding | Matti Salmi | Matti Salmi | 2002-08 | |||||
| wv-csp-sms | 3590 | udp | WV CSP SMS Binding | Matti Salmi | Matti Salmi | 2002-08 | |||||
| svn | 3690 | tcp | Subversion | Greg Hudson | Greg Hudson | 2003-01 | |||||
| svn | 3690 | udp | Subversion | Greg Hudson | Greg Hudson | 2003-01 | |||||
| quickbooksrds | 3790 | tcp | QuickBooks RDS | Almira | Almira | 2003-07 | |||||
| quickbooksrds | 3790 | udp | QuickBooks RDS | Almira | Almira | 2003-07 | |||||
| ndsconnect | 3890 | tcp | Niche Data Server Connect | Roland Schneider | Roland Schneider | 2003-10 | |||||
| ndsconnect | 3890 | udp | Niche Data Server Connect | Roland Schneider | Roland Schneider | 2003-10 | |||||
| udt-os | 3900 | tcp | Unidata UDT OS IANA assigned this well-formed service name as a replacement for "udt_os". |
James Powell | James Powell | ||||||
| udt_os | 3900 | tcp | Unidata UDT OS | James Powell | James Powell | This entry is an alias to "udt-os". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| udt-os | 3900 | udp | Unidata UDT OS IANA assigned this well-formed service name as a replacement for "udt_os". |
James Powell | James Powell | ||||||
| udt_os | 3900 | udp | Unidata UDT OS | James Powell | James Powell | This entry is an alias to "udt-os". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| nimsh | 3901 | tcp | NIM Service Handler | Paul B. Finley | Paul B. Finley | 2003-10 | |||||
| nimsh | 3901 | udp | NIM Service Handler | Paul B. Finley | Paul B. Finley | 2003-10 | |||||
| nimaux | 3902 | tcp | NIMsh Auxiliary Port | Paul B. Finley | Paul B. Finley | 2003-10 | |||||
| nimaux | 3902 | udp | NIMsh Auxiliary Port | Paul B. Finley | Paul B. Finley | 2003-10 | |||||
| charsetmgr | 3903 | tcp | CharsetMGR | Tatsuya Ueda | Tatsuya Ueda | 2003-10 | |||||
| charsetmgr | 3903 | udp | CharsetMGR | Tatsuya Ueda | Tatsuya Ueda | 2003-10 | |||||
| omnilink-port | 3904 | tcp | Arnet Omnilink Port | Ronen Shaul | Ronen Shaul | 2003-10 | |||||
| omnilink-port | 3904 | udp | Arnet Omnilink Port | Ronen Shaul | Ronen Shaul | 2003-10 | |||||
| mupdate | 3905 | tcp | Mailbox Update (MUPDATE) protocol | RFC 3656 | |||||||
| mupdate | 3905 | udp | Mailbox Update (MUPDATE) protocol | RFC 3656 | |||||||
| topovista-data | 3906 | tcp | TopoVista elevation data | Gregg Townsend | Gregg Townsend | 2003-11 | |||||
| topovista-data | 3906 | udp | TopoVista elevation data | Gregg Townsend | Gregg Townsend | 2003-11 | |||||
| imoguia-port | 3907 | tcp | Imoguia Port | Emidio Cunha | Emidio Cunha | 2003-11 | |||||
| imoguia-port | 3907 | udp | Imoguia Port | Emidio Cunha | Emidio Cunha | 2003-11 | |||||
| hppronetman | 3908 | tcp | HP Procurve NetManagement | Devon Dawson | Devon Dawson | 2003-11 | |||||
| hppronetman | 3908 | udp | HP Procurve NetManagement | Devon Dawson | Devon Dawson | 2003-11 | |||||
| surfcontrolcpa | 3909 | tcp | SurfControl CPA | Hywel Morgan | Hywel Morgan | 2003-11 | |||||
| surfcontrolcpa | 3909 | udp | SurfControl CPA | Hywel Morgan | Hywel Morgan | 2003-11 | |||||
| bv-is | 3990 | tcp | BindView-IS | ||||||||
| bv-is | 3990 | udp | BindView-IS | ||||||||
| omasgport | 4090 | tcp | OMA BCAST Service Guide | Mark Lipford | Mark Lipford | 2006-07 | |||||
| omasgport | 4090 | udp | OMA BCAST Service Guide | Mark Lipford | Mark Lipford | 2006-07 | |||||
| sieve | 4190 | tcp | ManageSieve Protocol | ||||||||
| 4190 | udp | Reserved | RFC 5804 | ||||||||
| wiegand | 4390 | tcp | Physical Access Control | Scott Guthery | Scott Guthery | 2008-08-25 | |||||
| wiegand | 4390 | udp | Physical Access Control | Scott Guthery | Scott Guthery | 2008-08-25 | |||||
| 4489-4499 | Unassigned | Known UNAUTHORIZED USE: Ports 4490 and 4491 | |||||||||
| rid | 4590 | tcp | RID over HTTP/TLS | IESG | IETF Chair | RFC 6546 | |||||
| 4590 | udp | Reserved | |||||||||
| 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 | |||||
| vxlan-gpe | 4790 | udp | Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN) | Lawrence Kreeger | Lawrence Kreeger | 2014-08-26 | |||||
| 4790 | tcp | 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 | ||||||||||
| 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 | ||||
| car | 5090 | sctp | Candidate AR | ||||||||
| aol | 5190 | tcp | America-Online | Marty Lyons | Marty Lyons | ||||||
| aol | 5190 | udp | America-Online | Marty Lyons | Marty Lyons | ||||||
| 5690-5692 | Unassigned | ||||||||||
| rfb | 5900 | tcp | Remote Framebuffer | Tristan Richardson | Tristan Richardson | 2006-03 | RFC 6143 | ||||
| rfb | 5900 | udp | Remote Framebuffer | Tristan Richardson | Tristan Richardson | 2006-03 | RFC 6143 | ||||
| 5901-5902 | Unassigned | ||||||||||
| ff-ice | 5903 | tcp | Flight & Flow Info for Collaborative Env | International Civil Aviation Organisation (ICAO) | Greg Saccone | 2022-06-03 | Defined TXT keys: FF-ICE | ||||
| ff-ice | 5903 | udp | Flight & Flow Info for Collaborative Env | International Civil Aviation Organisation (ICAO) | Greg Saccone | 2022-06-03 | Defined TXT keys: FF-ICE | ||||
| ff-ice | 5903 | sctp | Flight & Flow Info for Collaborative Env | International Civil Aviation Organisation (ICAO) | Greg Saccone | 2022-06-03 | Defined TXT keys: FF-ICE |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Almira | almira_niciu&intuit.com | 2003-07 | |
| Andreas Spalenski | andreas.spalenski&trsystems.de | 2008-11-24 | |
| Charles Honton | chas&honton.org | ||
| Cimarron Boozer | cboozer&funk.com | ||
| David Riggle | dave&busymac.com | 2008-01-07 | |
| David Vest | dave&mythicsoft.com | 2008-11-19 | |
| Devon Dawson | devon.dawson&hp.com | 2003-11 | |
| Dirk Hillbrecht | dirk&hillbrecht.de | ||
| Emidio Cunha | emidio&janeladigital.com | 2003-11 | |
| Gilbert Moineau | gilbert.moineau&colubris.com | 2002-05 | |
| Greg Hudson | ghudson&mit.edu | 2023-11-17 | |
| Greg Saccone | gregory.t.saccone&boeing.com | 2022-08-08 | |
| Greg Sidebottom | gregside&home.com | ||
| Gregg Townsend | gmt&cs.arizona.edu | 2003-11 | |
| Hywel Morgan | hywelm&surfcontrol.com | 2003-11 | |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| International Civil Aviation Organisation (ICAO) | gisinbox&icao.int | 2024-11-19 | |
| James Powell | james&mailhost.unidata.com | ||
| Jerome AERTS | PC SOFT | jae&pcsoft.fr | 2014-02-02 |
| Johnson Luo | johnson_luo&mail.sercomm.com.tw | ||
| Joseph Hines | jhines&webmethods.com | ||
| Joseph Krebs | joek&caps.com | ||
| Lawrence Kreeger | kreeger&cisco.com | 2013-04-19 | |
| Lyndon Ong | LyOng&ciena.com | ||
| Marc Baudoin | babafou&babafou.eu.org | ||
| Mark Lipford | mark.a.lipford&sprint.com | 2006-07 | |
| Marty Lyons | marty&aol.com | ||
| Matti Salmi | matti.salmi&nokia.com | 2002-08 | |
| Milton E. Sagen | msagen&extensis.com | ||
| Paul B. Finley | pfinley&us.ibm.com | 2003-10 | |
| PC SOFT | jae&pcsoft.fr | 2014-02-02 | |
| Peter Boucher | pboucher&senforce.com | ||
| Roland Schneider | rsch&nicherms.com | 2003-10 | |
| Ronen Shaul | ronen&arnetsystems.com | 2003-10 | |
| Scott Guthery | sguthery&hidcorp.com | 2008-08-25 | |
| Shams Naqi | SSNAQVI&aol.com | ||
| Steve Dobson | sdobson&allstor.com | ||
| Tatsuya Ueda | tatsu&ist.fujitsu.com | 2003-10 | |
| Tristan Richardson | iana&realvnc.com | 2006-03 | |
| William Egge | begge&emagisoft.com | ||
| Yoann Vandoorselaere | yoann&prelude-ids.org | 2005-08 |