When you sign up for a new domain for your website, you must enter your name and contact information in order to confirm your domain registration. This information, however, isn’t private. In fact, the contact details that you enter are visible publicly, and can be accessed by anyone using a WHOIS directory.

As you may have guessed, this can lead to a lot of privacy-related complications. Having your phone number and email address displayed publicly on the internet can expose you to huge amounts of marketing spam. It may even cause you to be targeted for domain hijacking or even identity theft.