WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.

Mrdomain - Mrdomain is one of the leading hosting sites that provides you an opportunity to create your own website or online store in no time and without any hidden cost.

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.

Europe Registry - Europe Registry is an all-in-one website that lets you register a wide range of European domain names by providing complete coverage of European ccTLD domain names, including .eu, .de, .nl, .be, .​es, .UK, and many others.

Whoisology - Connected database of whois records and whois history

domaindiscount24 - domaindiscount24 is a user-friendly retail customer portal for domain registration and management.