When you register a domain, you need to supply a valid street address, email and phone as per the policy adopted by ICANN, the Internet Corporation for Assigned Names and Numbers. This info, though, is not kept only by the domain registrar, but is visible to the public on WHOIS web sites as well, so anyone can see your details and some people may not be comfortable with that fact. As a consequence, lots of domain registrars have come up with the so-called Whois Privacy Protection service, which conceals the registrant’s information and upon a WHOIS lookup, people will see the details of the registrar company, not those of the domain owner. This service is also called Privacy Protection or Whois Privacy Protection, but all these names refer to the exact same service. Nowadays, most of the TLDs around the globe allow Whois Privacy Protection to be added, but there are still country-specific extensions that don’t support this service.