Each active domain is registered on the name of a particular person and through the registration procedure numerous details are submitted - the owner’s names, address, email, mobile phone number, and many others. This info along with the registrar company name and the registration/expiration dates is addressed as WHOIS of the Internet domain and in accordance with the policies of Internet Corporation for Assigned Names and Numbers (ICANN) it must be current and correct. If a domain has invalid WHOIS details, it may be reported and if the details are not corrected, the domain name could be deleted or the registrar company may take over its ownership. By default, the WHOIS details are public and can be seen on a lot of lookup Internet sites, or for a small number of country-code extensions - on the websites of the respective Registry businesses. All companies that offer registration services are obligated to provide a simple way for their clients to access and modify the WHOIS details of any domain name they own as much as the particular TLD allows it.