About

Hostname to IP is basically:

IP Geolocation - JSON endpoint

The API base path is http://ip-api.com/json/{query}

{query} can be a single IPv4/IPv6 address or a domain name. If you don't supply a query the current IP address will be used.

Parameters

Query parameters (such as custom fields and JSONP callback) are appended as GET request parameters.

API Documentation: https://ip-api.com/docs/api:json