The so-called WHOIS details of every single registered domain name contain information regarding the registrar organization, the registration and expiration dates, and also the names, phone number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a special protocol that enables you to get this information either through a command line or via one of the many Internet websites which provide WHOIS lookup services. All information should be up-to-date in accordance with the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not correct, the domain address can be reported and the result might be its deletion or losing its ownership. Several country-specific domain address extensions have specific limitations in connection with the change of their WHOIS details, but in the general case any detail can be modified freely and at any time. Such a modification will appear on lookup websites within 24 hours.