The so-called WHOIS details of every single registered domain contain information regarding the registrar company, the registration and expiration dates, as well as the names, contact number, postal address and email address of the owner, the admin and the tech/billing person. WHOIS is a special protocol that allows you to get all of this information either through a command line or through one of the numerous sites that offer WHOIS lookup services. All details should be up-to-date in accordance with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the details are not legitimate, the domain might be reported and the result might be its removal or losing its ownership. Several country-specific domain extensions have certain limitations in connection with the modification of their WHOIS information, but in the standard scenario any detail can be changed freely and at any moment. Such a modification will show up on lookup Internet sites within 24 hours.