Documentation

How each tool works, what its URL parameters do and, where one exists, the public API it exposes.

Guides

Base URL, authentication, rate limits, CORS and error conventions shared by every endpoint.

Resolve an IPv4 or IPv6 address to its PTR record, location and registry allocation, in the browser or over the public API.

Query any of 47 DNS record types against a resolver of your choice, from the browser or the public API.

Resolve a MAC address to the organisation that registered its OUI, including block size and address range.

Check whether a TCP port is reachable on a public host, one port, a range, or the common set.

Trace the network path to a public host and stream each hop as it is discovered.

Diagnose why a radio stream URL fails on Sonos S1 or S2, hop by hop, against the real Sonos trust store.