FreeGeoIP in its upgraded form. https://github.com/fiorix/freegeoip
All requests have to be HTTP GET requests in the following schema:
https://ipstack.com/ipstack_api.php?ip
ip required Valid IP address in IPv4 or IPv6 format.
I visisted IPStack Website, but I didn't want to register.
I saw the look up tool in the front page and digged it up. Found this.
Using this, you can get IP info without having to register :)
IPStack no longer permits tokenless access. Feel free to use IPinfo.io instead.