The so-called WHOIS details of every registered domain name include details about 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 lets you obtain all of this info through a command line or by using one of the many sites that offer WHOIS lookup services. All information should be up-to-date as per the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not accurate, the domain name might be reported and the result may be its deletion or losing its ownership. Some country-specific domain name extensions have specific limitations for the editing of their WHOIS details, but in the general case any detail can be modified freely and at any time. Such a change will show up on lookup websites within a day.