The so-called WHOIS details of any registered domain include information about the registrar organization, the registration and expiration dates, and also the names, telephone number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that permits you to get all this info through a command line or by using one of the numerous sites that offer WHOIS lookup services. All information ought to be up-to-date as per the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not legitimate, the domain address could be reported and the result could be its removal or losing its ownership. Some country-specific domain extensions have specific limitations in connection with the editing of their WHOIS info, but in the typical situation any detail can be modified freely and at any moment. Such a change will appear on lookup sites within 1 day.