WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.
Domain Details - Displays Server Type, Headers, IP Address, Location Flag, and links to Whois Reports.
Whoisology - Connected database of whois records and whois history
Online Domain Tools - Online-Domain-Tools.com makes your online life easier and happier.
Bulk Whois API - Bulk Whois API is a provider of parsed WHOIS data in JSON with simple API, competitive pricing, top notch support, and more.
IP Map - See your IP address and the IP address of the website you are visiting on a map.