If you are looking for the websites which are hosted on your IP ie the IP address where your website is hosted then you need to try out DomainbyIP.com which is a service which offers you the list of websites which are hosted on the same IP address. This service is very much similar to reverse phone lookup where you just enter the phone number and get the whole contact details.

Another site which offers similar service is the website outlook which not only shows you the sites hosted on the same IP but also gives you a lot of information like approximate traffic, revenue and value of the website.

You can use the DomainToIp tool to find the IP address of any domain name based on which you can find other sites on the same ip, also called as Ip Neighborhood Searcher Tool. These tools are useful when you are looking to find the websites owned by your competitors by making a IP search.