Today, the Internet offers a vast array of tools to help people who intend to retrieve information with the use of a telephone number. This is one of the many reasons why the reverse phone directory exists. This tool, which is in a form of service, provides users a host of information by merely keying in a telephone number .

One might ask, 'how does reverse phone directory work'? Imagine oneself walking along the beach and after reaching a certain point, stop and look back, and find the whole track from where you started walking by following the prints of your footsteps in the sand. This simple example shows how reverse phone directory works. Data that have been transferred are collected and contained in specific database for the sole use of the reverse directory system. The data collected and contained in the said database include details such as name, address, and other numbers relevant a particular phone number.

A reverse phone directory is helpful in numerous ways. The reverse phone directory can be used in any of the cases listed below.

- Getting a caller's name. A directory easily can help when one needs to find out the source of an unrecognized number, may it be from a prank caller, an unrecognized number that appeared on your phone bill or your cellular phone's registered calls. In the case of prank callers, you can find out who owns the line, where they they live, and who to ask for regarding the annoying caller. The information gathered from a reverse phone look up may also be passed on to the police for further assistance in handling repetitive, harassing calls.

- Acquiring an address. When getting an address perhaps of a friend, a co-worker, or former classmate from way back in high school or college, it is much convenient to do a reverse directory rather than skimming through an address or a phone book, which appears to be obsolete.

- Doing background checks. The name and number connection is often enough for these on-line services to check into criminal records and such other public records. For a fact, reverse directory was proven useful in countries like Pakistan where too many activists thrive. The Pakistan government has trapped some of these activists through the use of this on-line system.

Various sites offer this type of service and have varied prices or charges, as well as the information retrieved. It is advisable to visit a to an well established reverse phone directory site that will surely provide you complete and accurate information that you need.