This is not classified, it is available on public domain. Anyone can find it. The site is registered by a private person who has an account with the "domainbyproxy.com", who registered this site and purchased the domain on behalf of him. The details mentioned in that are not of the person but of the company. So, it doesn't tell us who the owner is. Since, the company won't tell anyone (including the investigative agencies, until they show solid proof or a warrant), this proves to be an effective way to guard the owner's privacy.