The so-called WHOIS details of every registered domain include info about the registrar firm, the registration and expiration dates, plus the names, contact number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a special protocol that allows you to get this info through a command line or by using one of the many sites that provide WHOIS lookup services. All details ought to be up-to-date in line with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not correct, the internet domain could be reported and the result might be its deletion or losing its ownership. A few country-specific internet domain extensions have certain limitations concerning the change of their WHOIS details, but in the typical scenario any detail can be changed freely and at any time. Such a change will show up on lookup Internet sites within a day.