If you have never had to deal with someone harassing you and your family, you may not think much about ways to find out who it might be. Some of these calls are irritating; some are disturbing, while some are threatening.
That is why the only reliable and guaranteed reverse cell phone look up sites are those that require you to sign up as a member for a very small fee. The white pages and directory assistance are called white pages because the pages in the phone book might as well be just that: white with no ink. Any sites that offer the same for free are more than likely not legitimate or are working from very outdated or incomplete lists.
Why else do you think telemarketers, government officials, and collection agencies are able to find you, even if your phone number is unlisted. You can usually search for a cell phone number or you can get a membership. These services put a lot of effort and time into gathering information to update their databases.
It is the sad truth that the only place where you are likely to find detailed reverse cell records is within the legitimate paid directories. Always be responsible and safe.