Look up an IP address (path slug)

Returns the geolocation record for the IP address given as the path slug: location (continent, country, subdivision, city, coordinates, postal), connection (ASN, organization, domain), security signals, and timezone. Both IPv4 and IPv6 are accepted; a value that isn't a valid IP address returns HTTP 400 before any lookup, and a valid but unlocatable address (private/reserved) returns HTTP 400 with the reason in the message. Every response carries the full canonical key tree; a leaf that can't be resolved for an address ships as null. See https://restcountries.com/docs/ip for the full reference.