IANA service name and common use for a TCP/UDP port (about 130 well-known ports)...

{ "method": "GET", "queryParams": { "port": 443 }, "type": "http" }

{ "example": { "asOf": "2026-10-11T14:26:46.903Z", "commonUse": "HTTPS: HTTP over TLS; also HTTP/3 over QUIC on UDP.", "degraded": false, "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "ianaAssigned": true, "ianaDescription": "http protocol over TLS/SSL", "ianaRows": [ { "description": "http protocol over TLS/SSL", "protocol": "tcp", "service": "https" }, { "description": "http protocol over TLS/SSL", "protocol": "udp", "service": "https" } ], "ianaServices": [ "https" ], "notChecked": [ "only about 130 common ports are embedded: a port missing from the table is NOT_IN_TABLE, which does not mean it is unassigned at IANA", "what is actually listening on a port (assignments are conventions, and software can use any port)", "…2 more" ], "officialAndCommonUseDiffer": false, "port": 443, "protocols": [ "tcp", "udp", "…1 more" ], "rangeClass": "System (well-known) 0-1023", "reasons": [ "Range class: System (well-known) 0-1023.", "Common use matches the IANA assignment." ], "source": "IANA Service Name and Transport Protocol Port Number Registry (retrieved 2026-10-11) for the embedded ports; conventions written for this shelf", "summary": "Port 443: IANA service https (tcp, udp, sctp). Common use: HTTPS: HTTP over TLS; also HTTP/3 over QUIC on UDP.", "verdict": "ASSIGNED" }, "type": "json" }