The so-called WHOIS details of every registered domain include info about the registrar firm, the registration and expiration dates, and also the names, contact 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 info through a command line or by using one of the numerous sites that offer WHOIS lookup services. All details should be up-to-date as per the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not accurate, the domain name might be reported and the result might be its deletion or losing its ownership. A number of country-specific domain extensions have certain limitations in connection with the change of their WHOIS details, but in the typical case any detail can be modified openly and at any time. Such a modification will appear on lookup websites within twenty four hours.