Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-13
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| abb-escp | 6316 | udp | Ethernet Sensor Communications Protocol | Jaime Antolin | Jaime Antolin | 2008-09-25 | |||||
| nav-data-cmd | 6317 | tcp | Navtech Radar Sensor Data Command | Navtech Radar | Guy Avery | 2013-02-20 | |||||
| nav-data | 6317 | udp | Navtech Radar Sensor Data | Navtech Radar | Guy Avery | 2013-02-20 | |||||
| iona-data | 6318 | tcp | IONA Measurement and control data | Insphere Ltd | Guy Avery | 2024-07-01 | |||||
| 6318 | udp | Reserved | |||||||||
| 6319 | Unassigned | ||||||||||
| emp-server1 | 6321 | tcp | Empress Software Connectivity Server 1 | Srdjan Holovac | Srdjan Holovac | ||||||
| emp-server1 | 6321 | udp | Empress Software Connectivity Server 1 | Srdjan Holovac | Srdjan Holovac | ||||||
| 6351-6354 | Unassigned | ||||||||||
| 6361-6362 | Unassigned | ||||||||||
| 6371-6378 | Unassigned | ||||||||||
| 6380-6381 | Unassigned | ||||||||||
| clariion-evr01 | 6389 | tcp | clariion-evr01 | Dave DesRoches | Dave DesRoches | ||||||
| clariion-evr01 | 6389 | udp | clariion-evr01 | Dave DesRoches | Dave DesRoches | ||||||
| 6391-6399 | Unassigned | ||||||||||
| boe-was | 6401 | boe-was | SAP | Giriraj Harapanahalli | 2008-05-05 | 2026-05-27 | |||||
| boe-resssvr1 | 6407 | Business Objects Enterprise internal server | SAP | Giriraj Harapanahalli | 2008-05-05 | 2026-05-27 | |||||
| boe-resssvr4 | 6410 | Business Objects Enterprise internal server | SAP | Giriraj Harapanahalli | 2008-05-05 | 2026-05-27 | |||||
| 6411-6416 | Unassigned | ||||||||||
| faxcomservice | 6417 | tcp | Faxcom Message Service | Albert Leung | Albert Leung | 2006-04 | |||||
| faxcomservice | 6417 | udp | Faxcom Message Service | Albert Leung | Albert Leung | 2006-04 | |||||
| syserverremote | 6418 | tcp | SYserver remote commands | David Ashkenazi | David Ashkenazi | 2010-03-23 | |||||
| 6418 | udp | Reserved | |||||||||
| svdrp | 6419 | tcp | Simple VDR Protocol | Klaus Schmidinger | Klaus Schmidinger | 2010-03-31 | |||||
| svdrp-disc | 6419 | udp | Simple VDR Protocol Discovery | Klaus Schmidinger | Klaus Schmidinger | 2015-05-08 | |||||
| nim-wan | 6421 | tcp | NIM_WAN | Rik Ditter | Rik Ditter | 2006-02 | |||||
| nim-wan | 6421 | udp | NIM_WAN | Rik Ditter | Rik Ditter | 2006-02 | |||||
| 6422-6431 | Unassigned | ||||||||||
| 6441 | Unassigned | ||||||||||
| ieee11073-20701 | 6464 | tcp | Port assignment for medical device communication in accordance to IEEE 11073-20701 | David Gregorczyk | David Gregorczyk | 2017-03-02 | |||||
| ieee11073-20701 | 6464 | udp | Port assignment for medical device communication in accordance to IEEE 11073-20701 | David Gregorczyk | David Gregorczyk | 2017-03-02 | |||||
| lvision-lm | 6471 | tcp | LVision License Manager | Brian McKinnon | Brian McKinnon | ||||||
| lvision-lm | 6471 | udp | LVision License Manager | Brian McKinnon | Brian McKinnon | ||||||
| servicetags | 6481 | tcp | Service Tags | Peter Schow | Peter Schow | 2007-01 | |||||
| servicetags | 6481 | udp | Service Tags | Peter Schow | Peter Schow | 2007-01 | |||||
| boks-servc | 6501 | tcp | BoKS Servc IANA assigned this well-formed service name as a replacement for "boks_servc". |
Magnus Nystrom | Magnus Nystrom | Known Unauthorized Use on port 6501 | |||||
| boks_servc | 6501 | tcp | BoKS Servc | Magnus Nystrom | Magnus Nystrom | Known Unauthorized Use on port 6501 | This entry is an alias to "boks-servc". This entry is now historic, not usable for use with many common service discovery mechanisms. | ||||
| boks-servc | 6501 | udp | BoKS Servc IANA assigned this well-formed service name as a replacement for "boks_servc". |
Magnus Nystrom | Magnus Nystrom | ||||||
| boks_servc | 6501 | udp | BoKS Servc | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "boks-servc". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| mcer-port | 6510 | tcp | MCER Port | Portnoy Boxman | Portnoy Boxman | ||||||
| mcer-port | 6510 | udp | MCER Port | Portnoy Boxman | Portnoy Boxman | ||||||
| 6511 | tcp | Reserved | |||||||||
| dccp-udp | 6511 | udp | Datagram Congestion Control Protocol Encapsulation for NAT Traversal | IESG | IETF Chair | RFC 6773 | |||||
| 6512-6512 | Unassigned | ||||||||||
| netconf-tls | 6513 | tcp | NETCONF over TLS | IESG | IETF Chair | 2024-01-24 | RFC 7589; RFC 9918 | ||||
| 6513 | udp | Reserved | |||||||||
| syslog-tls | 6514 | tcp | Syslog over TLS | RFC 5425 | |||||||
| syslog-tls | 6514 | udp | syslog over DTLS | RFC 6012 | |||||||
| syslog-tls | 6514 | dccp | syslog over DTLS | RFC 6012 | |||||||
| elipse-rec | 6515 | tcp | Elipse RPC Protocol | Fl√°vio Englert | Fl√°vio Englert | 2007-09-17 | |||||
| elipse-rec | 6515 | udp | Elipse RPC Protocol | Fl√°vio Englert | Fl√°vio Englert | 2007-09-17 | |||||
| 6516-6542 | Unassigned | ||||||||||
| sum | 6551 | tcp | Software Update Manager | Jan Dirven | Jan Dirven | 2007-12-13 | |||||
| sum | 6551 | udp | Software Update Manager | Jan Dirven | Jan Dirven | 2007-12-13 | |||||
| 6567 | Reserved | 2007-01 | 2011-08-26 | This entry has been removed on 2011-08-26. | |||||||
| parsec-peer | 6581 | tcp | Parsec Peer-to-Peer | Andreas Varga | Andreas Varga | ||||||
| parsec-peer | 6581 | udp | Parsec Peer-to-Peer | Andreas Varga | Andreas Varga | ||||||
| mstmg-sstp | 6601 | tcp | Microsoft Threat Management Gateway SSTP | Ori Yosefi | Ori Yosefi | 2009-05-04 | |||||
| 6601 | udp | Reserved | |||||||||
| bencher | 6610 | tcp | Bencher API | Bencher | Everett Pompeii | 2026-06-17 | |||||
| bencher | 6610 | udp | Bencher API | Bencher | Everett Pompeii | 2026-06-17 | |||||
| 6611-6618 | Unassigned | ||||||||||
| odette-ftps | 6619 | tcp | ODETTE-FTP over TLS/SSL | Ieuan Friend | Ieuan Friend | 2006-03 | RFC 5024 | ||||
| odette-ftps | 6619 | udp | ODETTE-FTP over TLS/SSL | Ieuan Friend | Ieuan Friend | 2006-03 | RFC 5024 | ||||
| kftp | 6621 | tcp | Kerberos V5 FTP Control | Robert J. Scott | Robert J. Scott | 2005-08 | |||||
| kftp | 6621 | udp | Kerberos V5 FTP Control | Robert J. Scott | Robert J. Scott | 2005-08 | |||||
| 6631 | Unassigned | 2004-05-28 | |||||||||
| mpls-udp | 6635 | udp | Encapsulate MPLS packets in UDP tunnels. | IESG | IETF Chair | 2015-02-10 | RFC 7510 | ||||
| mpls-udp-dtls | 6636 | udp | Encapsulate MPLS packets in UDP tunnels with DTLS. | IESG | IETF Chair | 2015-02-10 | RFC 7510 | ||||
| 6641-6652 | Unassigned | ||||||||||
| p4p-portal | 6671 | tcp | P4P Portal Service | Chris Griffiths | Chris Griffiths | 2008-07-28 | |||||
| p4p-portal | 6671 | udp | P4P Portal Service | Chris Griffiths | Chris Griffiths | 2008-07-28 | |||||
| 6691-6695 | Unassigned | ||||||||||
| ircs-u | 6697 | tcp | Internet Relay Chat via TLS/SSL | 2014-02-11 | RFC 7194 | ||||||
| kti-icad-srvr | 6701 | tcp | KTI/ICAD Nameserver | Stanley Knutson | Stanley Knutson | ||||||
| kti-icad-srvr | 6701 | udp | KTI/ICAD Nameserver | Stanley Knutson | Stanley Knutson | ||||||
| 6701 | sctp | Unassigned | 2010-01-26 | ||||||||
| frc-hp | 6704 | sctp | ForCES HP (High Priority) channel | RFC 5811 | |||||||
| frc-mp | 6705 | sctp | ForCES MP (Medium Priority) channel | RFC 5811 | |||||||
| frc-lp | 6706 | sctp | ForCES LP (Low priority) channel | RFC 5811 | |||||||
| 6707-6713 | Unassigned | ||||||||||
| ibprotocol | 6714 | tcp | Internet Backplane Protocol | Alessandro Bassi | Alessandro Bassi | ||||||
| ibprotocol | 6714 | udp | Internet Backplane Protocol | Alessandro Bassi | Alessandro Bassi | ||||||
| fibotrader-com | 6715 | tcp | Fibotrader Communications | Robert Wetzold | Robert Wetzold | 2006-01 | |||||
| fibotrader-com | 6715 | udp | Fibotrader Communications | Robert Wetzold | Robert Wetzold | 2006-01 | |||||
| princity-agent | 6716 | tcp | Princity Agent | ENSTEAM Sp. z o.o. | Tomasz Krakowiak | 2014-07-07 | 2015-07-08 | ||||
| 6716 | udp | Reserved | |||||||||
| 6717-6766 | Unassigned | ||||||||||
| plysrv-https | 6771 | tcp | PolyServe https | Mike Spitzer | Mike Spitzer | 2005-08 | |||||
| plysrv-https | 6771 | udp | PolyServe https | Mike Spitzer | Mike Spitzer | 2005-08 | |||||
| bfd-lag | 6784 | udp | Bidirectional Forwarding Detection (BFD) on Link Aggregation Group (LAG) Interfaces | IESG | IETF BFD Working Group Chairs | 2012-11-08 | 2014-01-09 | RFC 7130 | |||
| hnm | 6791 | tcp | Halcyon Network Manager | Fortra | Henriët Wilkinson | 2005-05 | 2023-05-24 | ||||
| hnm | 6791 | udp | Halcyon Network Manager | Fortra | Henriët Wilkinson | 2005-05 | 2023-05-24 | ||||
| acnet | 6801 | tcp | ACNET Control System Protocol | Fermilab | Rich Neswold | 2007-02 | 2017-07-13 | ||||
| acnet | 6801 | udp | ACNET Control System Protocol | Fermilab | Rich Neswold | 2007-02 | 2017-07-13 | ||||
| 6802-6816 | Unassigned | ||||||||||
| pentbox-sim | 6817 | tcp | PenTBox Secure IM Protocol | Alberto Ortega Llamas | Alberto Ortega Llamas | 2009-11-04 | |||||
| 6817 | udp | Reserved | |||||||||
| 6818-6830 | Unassigned | ||||||||||
| ambit-lm | 6831 | tcp | ambit-lm | Don Hejna | Don Hejna | ||||||
| ambit-lm | 6831 | udp | ambit-lm | Don Hejna | Don Hejna |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Albert Leung | aleung&biscom.com | 2006-04 | |
| Alberto Ortega Llamas | alberto.kun666&gmail.com | 2009-11-04 | |
| Alessandro Bassi | abassi&cs.utk.edu | ||
| Andreas Varga | sid&parsec.org | ||
| Bencher | info&bencher.dev | 2026-06-17 | |
| IETF BFD Working Group Chairs | bfd-chairs&tools.ietf.org | 2014-01-09 | |
| Brian McKinnon | bmk&lvision.com | ||
| Chris Griffiths | chris_griffiths&cable.comcast.com | 2008-07-28 | |
| Dave DesRoches | ddesroches&clariion.com | ||
| David Ashkenazi | david&synel.co.il | 2010-03-23 | |
| David Gregorczyk | david.gregorczyk&draeger.com | 2017-03-02 | |
| Don Hejna | djhejna&ambit.com | ||
| ENSTEAM Sp. z o.o. | support&ensteam.com | 2015-07-08 | |
| Everett Pompeii | everett&bencher.dev | 2026-06-17 | |
| Fl√°vio Englert | flavio&elipse.com.br | 2007-09-17 | |
| Fermilab | neswold&fnal.gov | 2017-07-13 | |
| Fortra | info&fortra.com | 2023-05-24 | |
| Giriraj Harapanahalli | giriraj.harapanahalli&sap.com | 2026-05-27 | |
| Guy Avery | Navtech Radar | guy.avery&navtechradar.com | 2013-02-20 |
| Guy Avery | Insphere Ltd | guy&insphereltd.com | 2013-02-20 |
| Henriët Wilkinson | henriet.wilkinson&fortra.com | 2023-05-24 | |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| Ieuan Friend | ieuan.friend&dip.co.uk | 2006-03 | |
| Insphere Ltd | guy&insphereltd.com | 2024-07-01 | |
| Jaime Antolin | jaime.antolin&ie.abb.com | 2008-09-25 | |
| Jan Dirven | jan.dirven&agfa.com | 2007-12-13 | |
| Klaus Schmidinger | Klaus.Schmidinger&tvdr.de | 2010-03-31 | |
| Magnus Nystrom | magnus&dynas.se | ||
| Mike Spitzer | mjs&polyserve.com | 2005-08 | |
| Navtech Radar | network.admin&navtechradar.com | 2013-02-20 | |
| Ori Yosefi | Ori.Yosefiµsoft.com | 2009-05-04 | |
| Peter Schow | Peter.Schow&sun.com | 2007-01 | |
| Portnoy Boxman | portnoy_boxman&bmc.com | 2005-01 | |
| Rich Neswold | neswold&fnal.gov | 2007-02 | |
| Rik Ditter | managers&generationtechnologies.com | 2006-02 | |
| Robert J. Scott | rob&hpcmo.hpc.mil | 2005-08 | |
| Robert Wetzold | robert.wetzold&fibotrader.com | 2006-01 | |
| SAP | Giriraj Harapanahalli | 2026-05-27 | |
| Srdjan Holovac | srdjan&empress.com | ||
| Stanley Knutson | Stanley.Knutson&ktiworld.com | ||
| Tomasz Krakowiak | ENSTEAM Sp. z o.o. | tomasz.krakowiak&ensteam.com | 2015-07-08 |