Also depending on how many service like phone or Internet they are hooked up into will determine your chances of finding someone online using one of these tools. Now if you find information about yourself online there really isn't much that you can do. Most of the information about you online is either public domain information or information that you put on the Internet yourself. All these website's are doing is collecting that information into a series of centralized spots.
The first place you should go is to the Social Internet to find people online. They most likely have a profile already and they are probably sharing to much information anyway. So the first stop will be Wink. Wink is a people search engine that makes it easy to find and connect with people online. Wink.com is the largest online people search with more than 200 million people profiles from across the Web, including social networks and other online communities.
The next stop will be the website's that track people for reunions and other school related issues. For some reason people want to be found for school reunions. Don't ask me why but they do ;-) So check out:
Reunion: In the ever-evolving world of social networking, Reunion.com is the leading website for the grown-up social-network user to reconnect and keep in touch with family, friends, lost loves, and colleagues as life changes. With more than 50 million registered users and membership increasing on average by 1 million per month, Reunion.com offers the fastest and most comprehensive way to rediscover and stay connected with people from your past.
Classmates.com: The company’s online social networking Web sites enable users to locate and interact with acquaintances from high school, college, work and the military.
Anywho: All of the residential and business white pages listings are public information obtained from local telephone records for published telephone listings. These listings can range from three months to six months old and are updated every three months. Since erroneous information comes from local companies, errors must be corrected through those local companies.
Also if you want locate someone by IP Address you can almost find their exact location.

