The so-called WHOIS details of every single registered domain include information regarding the registrar company, the registration and expiration dates, plus the names, telephone number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that allows you to retrieve all of this information through a command line or through one of the numerous Internet websites which provide WHOIS lookup services. All info must be up-to-date in accordance with the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the details are not correct, the domain name can be reported and the result may be its removal or losing its ownership. Some country-specific domain extensions have certain limitations in connection with the change of their WHOIS details, but in the standard situation any detail can be modified openly and at any moment. Such a modification will appear on lookup websites within a day.