ICANN requires that you provide current personal information to registrars when you register a domain. This information will then be required to be publicly displayed.
Although there is not an official WHOIS directory, it is the public output that domain registrars must display. It acts as a huge address book for domains. Each WHOIS record includes details about the registrant (.e.g. You, registrar (e.g. Monsterhost), name server, expiry date and so forth. Your information includes your name and address as well as your phone number.
If there are any questions regarding your domain or ownership confirmation, this information is vital. Unless you are protected under the GDPR, ICANN requires that this information be shared publicly.
There are many disadvantages to making your registrant information public. The biggest is that anyone can search your information online and use it in any way they like, even to spam you.
A domain privacy service is a way to ensure that your contact information is kept private.
We offer .de domain registration privacy to protect your private data from prying eyes. The main advantages you get from domain privacy, available when you register, are that you can sign up anonymously and also keep your personal data to yourself.