WHOIS is a protocol that makes it easy to view the details a particular domain name has been registered with through a command line or through the use of special web-based lookup websites. This information includes the names, address and e-mail address of the owner, administrator, tech and billing persons along with the registrar company the domain has been acquired through, the creation and expiration dates. Aside from several country-code TLDs that have specific limitations, the WHOIS info of any domain can be modified freely whenever you want, which is quite important provided that based on the policies of the top-level Internet Corporation, ICANN, all details ought to be current and valid all of the time. Failing to comply with these policies may result in losing the ownership of a domain and in many cases a domain address may even be removed from the Domain Name System and released for free registration.