Aside from the reverse phone number, white pages' reverse lookup also offers a reverse address option, which enables you to find out who lives at the mystery address. Free white pages are available to everyone who uses the web.
Enter the number into the box on this page and you're there. There are many more possibilities, but finding out whoever it is that's trying to call you can be extremely important, not to mention very, very revealing. They point to more surfers using online newspapers and magazines as their first choice.
Using reverse cell phone directory you can find information on any cell number in North America. Sometime you will have to do a lot of searching and luck out. Before you have to pay though, they will usually offer you the ability to search their database for free in order to see if the directory contains the information you want.
If the number you are searching for is listed in the database you will be given the name, address, billing company and other person information relating to the owner of the cellular number. In addition to reverse lookups you will be able to access information such as background checks and background reports, people finder databases, bankruptcies, liens, public records databases including births, deaths, marriages, divorces and adoptions, sex offender records, police records, and much more. Anybody can access this information.
Go for paid services that provide directories for cell phone numbers as well. Some harassment may come in your mail box and some on the phone, so it is nice to be prepared.