IPlist.cc - Get IP details for free through the web or via API.
Ipregistry - Ipregistry is a fast, reliable IP geolocation and threat data API. People use Ipregistry to personalize content, analyze traffic, target ads, block countries but also to prevent abuse by detecting Proxy and Tor users, known spammers and bad bots.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
IPTools - The "IP Tools" is powerful and handy application for network analyzing.
FindHostName - Host Name and IP Address Checker
ipapi - Web analytics with IP address lookup and location API