In other words, If you have an IP and want to know domains that are loaded on this web server use the following site : http://www.webhosting.info/
1) go to the above URL
2) enter the IP you want to check in Search box (for ex. 188.8.131.52 )
3) click on Search
4) you will find cnn.com
5) Thankx to Waelaase for sharing.
6) if you know how they do it, please let me know