WHOIS is a protocol which makes it easy to see the details a particular domain has been registered with either through a command line or by using special web-based lookup websites. This info includes the names, address and email address of the owner, admin, technical and billing persons along with the registrar business the domain has been purchased through, the creation and expiration dates. Except for a few country-code TLDs that have certain limitations, the WHOIS information of any Internet domain can be modified freely whenever you want, which is quite necessary given that in line with the policies of the top-level Internet Corporation, ICANN, all details ought to be current and correct always. Failing to conform with these policies could lead to losing the ownership of a domain name and in many cases a domain name may even be deleted from the Domain Name System and released for free registration.