Port Reference
Filterable list of the TCP and UDP ports that actually come up in day-to-day work, searchable by number, service or protocol.
Matching any port.
Scope of this list
This is a working shortlist, not the IANA registry. It covers the services worth recognising on a packet capture or a firewall rule, with the ports that are genuinely in use rather than every historical assignment. For the full picture see the IANA service name and port number registry.
Ports 0 to 1023 are well known and normally need elevated privileges to bind, 1024 to 49151 are registered, and 49152 to 65535 are the ephemeral range your own outbound connections are assigned from.