The so-called WHOIS details of every registered domain include info about the registrar firm, the registration and expiration dates, and also the names, phone number, postal address and email address of the owner, the admin and the tech/billing person. WHOIS is a special protocol that lets you obtain this information either through a command line or via one of the many websites that offer WHOIS lookup services. All details should be up-to-date in line with the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the details are not legitimate, the domain can be reported and the result may be its removal or losing its ownership. Some country-specific internet domain extensions have certain limitations concerning the editing of their WHOIS information, but in the general case any detail can be changed freely and at any time. Such a modification will show up on lookup sites within 24 hours.