The so-called WHOIS details of every registered domain name include info about the registrar company, the registration and expiration dates, along with the names, phone number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that lets you get this info either through a command line or by using one of the many websites that provide WHOIS lookup services. All contact 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 details are not accurate, 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 change of their WHOIS details, but in the general scenario any detail can be changed openly and at any moment. Such a modification will appear on lookup websites within 24 hours.