Search domains by Google AdSense
The Google AdSense search function allows you to find all websites that use the same AdSense ID tag in their code. Having found an AdSense code and entered it into the search bar, you will be able to see all websites that share a common AdSense code. Very often, this will allow you to see whether a single person or company owns multiple websites running their AdSense through a single account. See basic who-is information, the website’s country of origin, its hosting provider, and much other useful information.