WHOIS is a protocol which makes it an easy task to see the info a particular domain name has been registered with through a command line or by using special web-based lookup sites. This info includes the names, address and e-mail address of the owner, administrator, tech and billing persons along with the registrar business the Internet domain has been purchased through, the creation and expiration dates. Aside from some country-code TLDs that have certain limitations, the WHOIS info of any domain name can be modified freely anytime, which is quite important given that in accordance with the policies of the top-level Internet Corporation, ICANN, all details must be current and correct always. Inability to comply with these policies could lead to losing the ownership of an Internet domain and in some cases a domain name may even be removed from the Domain Name System and released for free registration.