The so-called WHOIS details of any registered domain name include info about the registrar organization, 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 specific protocol that allows you to obtain all this information either through a command line or using one of the numerous websites that offer WHOIS lookup services. All info should be up-to-date as per the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the details are not correct, the domain may be reported and the result could be its deletion or losing its ownership. A number of country-specific internet domain extensions have specific limitations for the modification of their WHOIS information, but in the general case any detail can be edited openly and at any time. Such an adjustment will show up on lookup websites within 1 day.