IP Guide - Look up IP addresses, networks, and ASNs
WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.
IPconfig.pw - The best tool to view information about IP addresses
Whoisology - Connected database of whois records and whois history
ipXapi - The most complete IP to geolocation API.
WebCargo - Optimize your workflow by offloading it to us. Useful API's with seamless integration that scale to your needs.