The so-called WHOIS details of any registered domain contain details about the registrar organization, the registration and expiration dates, plus 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 permits you to retrieve this information through a command line or using one of the many websites that provide WHOIS lookup services. All details ought to be up-to-date in accordance with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not legitimate, the domain name may be reported and the result could be its deletion or losing its ownership. A number of country-specific domain name extensions have specific limitations concerning the editing of their WHOIS info, but in the general case any detail can be changed freely and at any time. Such an adjustment will show up on lookup sites within a day.