Reverse WHOIS Searching

Once a user has discovered that someone, or some organization has registered a website and they have identified the website registrant’s information, the next step is to conduct a Reverse WHOIS search using a contact point relating to the domain registrant.

In the video below, you’ll see one example of a Reverse WHOIS search engine from Domain Tools, a well known utility for conducting these types of searches.

Source: https://www.youtube.com/watch?v=EkUj6oISnaw