Finding out who an email address belongs to can be accomplished by a series of small Web searches; basically, you're going to be following the clues left behind in the email address itself.
The very first clue you're going to want to follow is the domain.
Type in your email address to one of these people-specific search engines and if it's been publicly shared, it's going to show up in the search results.
Using the Deep, or Invisible, Web (the vast part of the Web that doesn't necessarily show up in a rudimentary Web search) to find information related to an email address can reap some impressive results.
This will search for your username across the top 115 social network's (takes 45 seconds).Once you have that IP address, plug it into a simple IP address lookup tool, and you'll be able to determine the general geographic area of where that email originated.If you already have an email address and want to see what another kind of information you can find that is associated with it, you might be surprised at what you could discover.Sometimes the easiest solution can be the best one.If you're not sure who that email address belongs to, simply email them a polite message asking for their information - it couldn't hurt to try, anyway.It all depends on where that particular email address has been posted publicly on the Web. In order for this email search to be as effective as possible, it's suggested to use at least three different search engines (for a comprehensive list of over 100 search engines, read The Ultimate Search Engine List).