§ ports

ports.

Bidirectional port-number reference. Type a number to find the service; type a service name to find the port(s). Curated, not exhaustive — covers ~80 commonly-looked-up ports.

scope

IANA well-known + de-facto developer-tooling assignments (postgres, redis, k8s API, etc.). does not include ephemeral port ranges or every assigned-but-unused IANA entry.

rfc links

when a primary RFC is canonical for a service, the number is linked; click to read the spec.