MyIPNeighbors search engine
My IP Neighbors lets you find out if any other web sites ("virtual hosts") are hosted on a given web server.
The tool is a great way to find out who your hosting neighbors are, or just to see how many other websites your hosting company runs from the same machine. Or perhaps you'd like to know if that flashy company still uses cheap hosting like the rest of us.
You can search by hostname or by IP. Search results include the neighbor's website URL's and titles, and links to WHOIS data.
Our database contains over 125 million domains, and has been running since August 2009.