The so-called WHOIS details of every single registered domain contain information about the registrar company, the registration and expiration dates, plus the names, phone number, postal address and e-mail address of the owner, the admin and the tech/billing person. WHOIS is a specific protocol that lets you retrieve this info through a command line or through one of the numerous websites which provide WHOIS lookup services. All information ought to be up-to-date as per the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not accurate, the domain could be reported and the result may be its deletion or losing its ownership. A number of country-specific domain extensions have certain limitations regarding the change of their WHOIS information, but in the standard case any detail can be edited easily and at any time. Such a modification will appear on lookup sites within twenty four hours.