Contact

Write to support@knownports.online. Messages are read by Liam Cooper, usually within a few days.

Corrections

If a page differs from the IANA registry, please name the port number and what you expected. Each page is rebuilt from the registry file, so a correction usually means the site is behind the latest registry update or a rule on the sources page needs another look.

Registry changes

Requests to register, change or release a port number go to IANA, not to this site.