Each and every active domain is registered on the name of a person and through the registration procedure a lot of details are introduced - the owner’s names, address, email, mobile phone number, etc. This information along with the registrar company name and the registration/expiration dates is known as WHOIS of the Internet domain and in accordance with the policies of Internet Corporation for Assigned Names and Numbers (ICANN) it needs to be current and correct. If a domain name has invalid WHOIS details, it can be reported and if the details aren't fixed, the Internet domain could be deleted or the registrar company may take over its ownership. By default, the WHOIS details are public and may be seen on a lot of lookup Internet sites, or for a smaller number of country-code extensions - on the websites of the respective Registry companies. All companies that provide registration services are required to provide a simple way for their clients to access and change the WHOIS information of any Internet domain they own as much as the particular TLD allows it.