Look up domain registration information. Check who owns a domain, when it was registered, and when it expires.
WHOIS is a public database that shows who registered a domain, when it was registered, and when it expires.
Many domains use WHOIS privacy services to hide personal information. SprintCloud offers free WhoisGuard on all domains.
Use WHOIS to see if a domain is taken, who owns it, and when it might become available for registration.