whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.
WhoisAPI - WhoisAPI is the premier provider of freshly parsed whois data for domain names and IP addresses...
What is My IP Address - Open Source Website To Get Your IPs Address By WebRTC
WhoAPI - WhoAPI is an API service for mass requests of domain information like domain registration availability and structured whois data in JSON.
ipinfo.io - Simple IP address information.
WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.