SpyOnWeb.com takes the information from public sources, then structures it for your quick and convenient search for the websites that probably belong to the same owner. Their web crawler picks out the following data: ip address, google adsense id, google analytics id, yahoo publisher network id, yandex direct id.
With this tool you can easily disclose websites with the same ip address, advertising and statistic codes.
Simply enter website url, ip address, adversting or statistics code to discover your rivals in internet business and use this data for your further strategy.
And free of charge!
Source:
http://spyonweb.com/
