The so-called WHOIS details of every registered domain name include information regarding the registrar company, the registration and expiration dates, and also the names, telephone number, postal address and email address of the owner, the administrator and the tech/billing person. WHOIS is a special protocol that allows you to retrieve all this information either through a command line or through one of the many websites which provide WHOIS lookup services. All details ought to be up-to-date as per the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not correct, the internet domain could be reported and the result may be its removal or losing its ownership. A number of country-specific domain address extensions have certain limitations concerning the change of their WHOIS information, but in the standard scenario any detail can be modified easily and at any moment. Such a modification will appear on lookup sites within 1 day.