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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5550 | udp | Reserved | |||||||||
| rscd | 5750 | tcp | Bladelogic Agent Service | Brian Trevor | Brian Trevor | 2008-10-24 | |||||
| rscd | 5750 | udp | Bladelogic Agent Service | Brian Trevor | Brian Trevor | 2008-10-24 | |||||
| x500ms | 5757 | tcp | OpenMail X.500 Directory Server | OpenMail Encyclopedia; Don Loughry | OpenMail Encyclopedia; Don Loughry | ||||||
| x500ms | 5757 | udp | OpenMail X.500 Directory Server | OpenMail Encyclopedia; Don Loughry | OpenMail Encyclopedia; Don Loughry | ||||||
| spramsca | 5769 | tcp | x509solutions Internal CA | Brendan Fay | Brendan Fay | 2006-02 | |||||
| spramsca | 5769 | udp | x509solutions Internal CA | Brendan Fay | Brendan Fay | 2006-02 | |||||
| spramsd | 5770 | tcp | x509solutions Secure Data | Brendan Fay | Brendan Fay | 2006-02 | |||||
| spramsd | 5770 | udp | x509solutions Secure Data | Brendan Fay | Brendan Fay | 2006-02 | |||||
| 6150-6158 | Unassigned | ||||||||||
| 6245-6250 | Unassigned | ||||||||||
| adap | 6350 | tcp | App Discovery and Access Protocol | Thomas Kjoernes | Thomas Kjoernes | 2010-06-22 | |||||
| adap | 6350 | udp | App Discovery and Access Protocol | Thomas Kjoernes | Thomas Kjoernes | 2010-06-22 | |||||
| boks | 6500 | tcp | BoKS Master | Magnus Nystrom | Magnus Nystrom | ||||||
| boks | 6500 | udp | BoKS Master | Magnus Nystrom | Magnus Nystrom | ||||||
| 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. | |||||
| boks-servm | 6502 | tcp | BoKS Servm IANA assigned this well-formed service name as a replacement for "boks_servm". |
Magnus Nystrom | Magnus Nystrom | ||||||
| boks_servm | 6502 | tcp | BoKS Servm | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "boks-servm". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| boks-servm | 6502 | udp | BoKS Servm IANA assigned this well-formed service name as a replacement for "boks_servm". |
Magnus Nystrom | Magnus Nystrom | ||||||
| boks_servm | 6502 | udp | BoKS Servm | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "boks-servm". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| boks-clntd | 6503 | tcp | BoKS Clntd IANA assigned this well-formed service name as a replacement for "boks_clntd". |
Magnus Nystrom | Magnus Nystrom | ||||||
| boks_clntd | 6503 | tcp | BoKS Clntd | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "boks-clntd". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| boks-clntd | 6503 | udp | BoKS Clntd IANA assigned this well-formed service name as a replacement for "boks_clntd". |
Magnus Nystrom | Magnus Nystrom | ||||||
| boks_clntd | 6503 | udp | BoKS Clntd | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "boks-clntd". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| 6504 | Unassigned | ||||||||||
| badm-priv | 6505 | tcp | BoKS Admin Private Port IANA assigned this well-formed service name as a replacement for "badm_priv". |
Magnus Nystrom | Magnus Nystrom | ||||||
| badm_priv | 6505 | tcp | BoKS Admin Private Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "badm-priv". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| badm-priv | 6505 | udp | BoKS Admin Private Port IANA assigned this well-formed service name as a replacement for "badm_priv". |
Magnus Nystrom | Magnus Nystrom | ||||||
| badm_priv | 6505 | udp | BoKS Admin Private Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "badm-priv". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| badm-pub | 6506 | tcp | BoKS Admin Public Port IANA assigned this well-formed service name as a replacement for "badm_pub". |
Magnus Nystrom | Magnus Nystrom | ||||||
| badm_pub | 6506 | tcp | BoKS Admin Public Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "badm-pub". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| badm-pub | 6506 | udp | BoKS Admin Public Port IANA assigned this well-formed service name as a replacement for "badm_pub". |
Magnus Nystrom | Magnus Nystrom | ||||||
| badm_pub | 6506 | udp | BoKS Admin Public Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "badm-pub". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| bdir-priv | 6507 | tcp | BoKS Dir Server, Private Port IANA assigned this well-formed service name as a replacement for "bdir_priv". |
Magnus Nystrom | Magnus Nystrom | ||||||
| bdir_priv | 6507 | tcp | BoKS Dir Server, Private Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "bdir-priv". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| bdir-priv | 6507 | udp | BoKS Dir Server, Private Port IANA assigned this well-formed service name as a replacement for "bdir_priv". |
Magnus Nystrom | Magnus Nystrom | ||||||
| bdir_priv | 6507 | udp | BoKS Dir Server, Private Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "bdir-priv". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| bdir-pub | 6508 | tcp | BoKS Dir Server, Public Port IANA assigned this well-formed service name as a replacement for "bdir_pub". |
Magnus Nystrom | Magnus Nystrom | ||||||
| bdir_pub | 6508 | tcp | BoKS Dir Server, Public Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "bdir-pub". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| bdir-pub | 6508 | udp | BoKS Dir Server, Public Port IANA assigned this well-formed service name as a replacement for "bdir_pub". |
Magnus Nystrom | Magnus Nystrom | ||||||
| bdir_pub | 6508 | udp | BoKS Dir Server, Public Port | Magnus Nystrom | Magnus Nystrom | This entry is an alias to "bdir-pub". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
| mgcs-mfp-port | 6509 | tcp | MGCS-MFP Port | Minoru Ozaki | Minoru Ozaki | ||||||
| mgcs-mfp-port | 6509 | udp | MGCS-MFP Port | Minoru Ozaki | Minoru Ozaki | ||||||
| fg-sysupdate | 6550 | tcp | fg-sysupdate | Mark Beyer | Mark Beyer | ||||||
| fg-sysupdate | 6550 | udp | fg-sysupdate | Mark Beyer | Mark Beyer | ||||||
| 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 | ||||
| iccrushmore | 6850 | tcp | ICCRUSHMORE | Dave Hubbard | Dave Hubbard | ||||||
| iccrushmore | 6850 | udp | ICCRUSHMORE | Dave Hubbard | Dave Hubbard | ||||||
| 6947-6950 | Unassigned | ||||||||||
| silhouette | 7500 | tcp | Silhouette User | Anthony Payne | Anthony Payne | 2004-02 | |||||
| silhouette | 7500 | udp | Silhouette User | Anthony Payne | Anthony Payne | 2004-02 | |||||
| ovbus | 7501 | tcp | HP OpenView Bus Daemon | David M. Rhodes | David M. Rhodes | Known Unauthorized Use on port 7501 | |||||
| ovbus | 7501 | udp | HP OpenView Bus Daemon | David M. Rhodes | David M. Rhodes | Known Unauthorized Use on port 7501 | |||||
| 7502-7507 | Unassigned | ||||||||||
| adcp | 7508 | tcp | Automation Device Configuration Protocol | Festo AG & Co. KG | Joerg Ullmann | 2011-05-27 | 2012-07-26 | ||||
| 7508 | udp | Reserved | |||||||||
| acplt | 7509 | tcp | ACPLT - process automation service | The Chair for Process Control Engineering | Ulrich Epple | 2010-12-07 | 2012-08-07 | ||||
| 7509 | udp | Reserved | |||||||||
| 7550 | tcp | Reserved | |||||||||
| cloudsignaling | 7550 | udp | Cloud Signaling Service | Scott Dawson | Scott Dawson | 2011-07-01 | |||||
| 8045-8050 | Unassigned | ||||||||||
| 8150-8152 | Unassigned | ||||||||||
| 8323-8350 | Unassigned | ||||||||||
| npmp | 8450 | tcp | npmp | Ian Chard | Ian Chard | ||||||
| npmp | 8450 | udp | npmp | Ian Chard | Ian Chard | ||||||
| fmtp | 8500 | tcp | Flight Message Transfer Protocol | Eivan Cerasi | Eivan Cerasi | 2003-12 | |||||
| fmtp | 8500 | udp | Flight Message Transfer Protocol | Eivan Cerasi | Eivan Cerasi | 2003-12 | |||||
| cmtp-mgt | 8501 | tcp | CYTEL Message Transfer Management | ||||||||
| cmtp-av | 8501 | udp | CYTEL Message Transfer Audio and Video | Frank Jäkel | Frank Jäkel | 2011-04-29 | |||||
| ftnmtp | 8502 | tcp | FTN Message Transfer Protocol | Yuri Myakotin | Yuri Myakotin | 2014-01-07 | |||||
| 8502 | udp | Reserved | |||||||||
| lsp-self-ping | 8503 | udp | MPLS LSP Self-Ping | IESG | IETF Chair | 2015-06-11 | 2016-02-01 | RFC 7746 | |||
| 8503 | tcp | Reserved | |||||||||
| 8504-8553 | Unassigned | ||||||||||
| dey-keyneg | 8750 | tcp | DEY Storage Key Negotiation | DEY Storage Systems, Inc. | Garrett D'Amore | 2013-03-01 | |||||
| 8750 | udp | Reserved | |||||||||
| versiera | 9050 | tcp | Versiera Agent Listener | Frank Pikelner | Frank Pikelner | 2010-01-15 | |||||
| 9050 | udp | Reserved | |||||||||
| sntlkeyssrvr | 9450 | tcp | Sentinel Keys Server | Martin Ziskind | Martin Ziskind | 2008-08-21 | |||||
| sntlkeyssrvr | 9450 | udp | Sentinel Keys Server | Martin Ziskind | Martin Ziskind | 2008-08-21 | |||||
| ismserver | 9500 | tcp | ismserver | Ian Gordon | Ian Gordon | ||||||
| ismserver | 9500 | udp | ismserver | Ian Gordon | Ian Gordon | ||||||
| 9501-9521 | Unassigned | ||||||||||
| board-voip | 9750 | tcp | Board M.I.T. Synchronous Collaboration | Francesco Rosi | Francesco Rosi | 2006-01 | |||||
| board-voip | 9750 | udp | Board M.I.T. Synchronous Collaboration | Francesco Rosi | Francesco Rosi | 2006-01 | |||||
| kca-service | 9878 | udp | The KX509 Kerberized Certificate Issuance Protocol in Use in 2012 | IESG | IETF Chair | 2012-07-12 | RFC 6717 | Historically, this service has been referred to as "kca_service", but this service name does not meet the registry requirements. | |||
| multicast-ping | 9903 | udp | Multicast Ping Protocol | 2011-12-09 | RFC 6450 | ||||||
| apc-9950 | 9950 | tcp | APC 9950 | American Power Conversion | American Power Conversion | ||||||
| apc-9950 | 9950 | udp | APC 9950 | American Power Conversion | American Power Conversion | ||||||
| zabbix-agent | 10050 | tcp | Zabbix Agent | Alexei Vladishev | Alexei Vladishev | 2006-02 | |||||
| zabbix-agent | 10050 | udp | Zabbix Agent | Alexei Vladishev | Alexei Vladishev | 2006-02 | |||||
| 10500 | tcp | Reserved | |||||||||
| hip-nat-t | 10500 | udp | HIP NAT-Traversal | IESG | IETF Chair | 2020-08-12 | RFC 5770; RFC 9028 | ||||
| 10501-10539 | Unassigned | ||||||||||
| 11724-11750 | Unassigned | ||||||||||
| vcscmd | 14150 | tcp | Veritas Cluster Server Command Server | Anand Bhalerao | Anand Bhalerao | 2008-10-02 | |||||
| 14150 | udp | Reserved |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Alexei Vladishev | alexei.vladishev&zabbix.com | 2006-02 | |
| American Power Conversion | ports&apcc.com | 2002-02 | |
| Anand Bhalerao | anand_bhalerao&symantec.com | 2008-10-02 | |
| Anthony Payne | opayne&pacbell.net | 2004-02 | |
| Brendan Fay | brendan.fay&x509solutions.com | 2006-02 | |
| Brian Trevor | btrevor&bmc.com | 2008-10-24 | |
| The Chair for Process Control Engineering | ks&plt.rwth-aachen.de | 2012-08-07 | |
| Dave Hubbard | dave&icc.net | ||
| David M. Rhodes | davidrho&cnd.hp.com | ||
| DEY Storage Systems, Inc. | garrett&dey-sys.com | 2013-03-01 | |
| Don Loughry | DON_LOUGHRY&hp-cupertino-om4.om.hp.com | ||
| Eivan Cerasi | eivan.cerasi&eurocontrol.int | 2022-08-08 | |
| Festo AG & Co. KG | Software-Support&de.festo.com | 2012-07-26 | |
| Francesco Rosi | frosi&orenburg.com | 2006-01 | |
| Frank Jäkel | Frank.Jaekel&cytel.de | 2011-04-29 | |
| Frank Pikelner | frank.pikelner&netcraftcommunications.com | 2010-01-15 | |
| Garrett D'Amore | DEY Storage Systems, Inc. | garrett&dey-sys.com | 2013-03-01 |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| Ian Chard | ian&tanagra.demon.co.uk | ||
| Ian Gordon | iangµmuse.co.uk | ||
| Ieuan Friend | ieuan.friend&dip.co.uk | 2006-03 | |
| Joerg Ullmann | Festo AG & Co. KG | jgu&de.festo.com | 2012-07-26 |
| Magnus Nystrom | magnus&dynas.se | ||
| Mark Beyer | mbeyer&freegate.com | ||
| Martin Ziskind | ziskind&us.ibm.com | 2008-08-21 | |
| Minoru Ozaki | Minoru.Ozaki&rdmg.mgcs.mei.co.jp | ||
| OpenMail Encyclopedia | opencyc&hpopd.pwd.hp.com | ||
| Scott Dawson | sdawson&arbor.net | 2011-07-01 | |
| Thomas Kjoernes | thomas&ipv.no | 2010-06-22 | |
| Ulrich Epple | ks&plt.rwth-aachen.de | 2012-08-07 | |
| Yuri Myakotin | yuri&ym-com.net | 2014-01-07 |