The so-called WHOIS details of any registered domain name include details about the registrar organization, the registration and expiration dates, as well as the names, telephone number, postal address and email address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that lets you get all this info either through a command line or through one of the many sites which provide WHOIS lookup services. All details should be up-to-date in line with the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not legitimate, the domain address can be reported and the result could be its deletion or losing its ownership. A number of country-specific domain name extensions have specific limitations for the change of their WHOIS info, but in the standard scenario any detail can be modified openly and at any moment. Such a modification will appear on lookup sites within a day.