The so-called WHOIS details of every single registered domain name contain details about the registrar company, the registration and expiration dates, along with the names, telephone number, postal address and e-mail address of the owner, the admin and the tech/billing person. WHOIS is a special protocol that allows you to obtain all this info through a command line or through one of the numerous websites which provide WHOIS lookup services. All contact details should be up-to-date as per the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not legitimate, the internet domain can be reported and the result could be its removal or losing its ownership. A few country-specific domain extensions have specific limitations regarding the modification of their WHOIS info, but in the general situation any detail can be modified openly and at any time. Such a change will appear on lookup sites within 1 day.