www.who.is

         who.is is the web’s premier choice when it comes to performing a WHOIS lookup on domain names. Since 2005, it offered unique IP tools to look up IP addresses on thousands of top-level domains (TLDs) and second-level domains (SLDs). Its WHOIS tool provides valuable domain information such as domain registrar, status, expiration date, and DNS name servers.

          Use who.is site to quickly locate administrative and technical contact information for the owner of any domain name. Its domain name WHOIS results also include IP and IP location information, web server information, related domain availability, premium domain listings and more.

Link: http://www.who.is/

www.statden.com

       StatDen allows you to check domain names and get an in depth report on the domains performance, stats and information about the domain.

Link: http://www.statden.com/

www.domaintools.com

        DomainTools combines the most comprehensive set of domain name ownership records available with important web hosting data to expose new opportunities in website improvement, domain investment and brand protection. DomainTools data reaches back through more than a decade of Internet history.

         Fortune 100 companies, small business owners, major domain investors—almost 1 million members choose DomainTools to protect and grow the value of their web sites, their domain names and their intellectual property on a daily basis.

Link: http://www.domaintools.com/

www.whois.com

      whois? is a people-centric platform that enables users to create, manage and propagate their presence on the web. whois? build personal media technologies that empower users to aggregate all their online identities, services, and personas in one place. whois? aim to transform how people use the web and become the most trusted brand for the world wide web of people, or as whois? like to say here, the "google of People"

Link: http://www.whois.com/