Just by doing a simple search about tracing cell phone numbers, you will come across thousands of websites that promises to provide such service for free. Too bad, this is not completely free like what you think it is. What these websites provide are limited pieces of information for free. Actually, cell numbers are not listed in white pages or public telephone directories because doing such will give access to different people and could even be used by telemarketers. free reverse cell phone directory This is one of the reasons why cell phone numbers are not displayed in the eyes of the public. Cellular phone numbers, although they’re unlisted, can be traced. There are certain companies that offer reverse mobile phone lookup services.