Reverse phone number look up is a facility that enables an individual to know the details about a person with a particular phone number. It is generally used by either law enforcing agencies or emergency services to know the address from which a call was made so that appropriate action could be initiated.

Reverse phone number look up can be done using the internet by logging onto websites which provide this facility with a one time fees. They provide you with information such as name and address of the number owner. The reverse phone lookup facility is generally a paid one for cellular numbers since their connection is provided by different cellular companies, whereas it is free for landline numbers as the numbers are provided by regional phone companies for making them accessible to be added to online searchable database.

Reverse white pages were used before the internet came into picture. It was similar to yellow pages, the difference being that it had numbers arranged in a sequence and by knowing the number, one could check the details. Whereas in the yellow pages it was inverse; that is you can check out the details by knowing the name. Its working is similar to other such online search programs.

A reverse phone number lookup facility has an online database of various phone numbers which are either provided by the regional phone companies or individual cellular companies. When a number is entered the software takes out the details associated with number and displays it. It is a less tedious and a simpler way to obtain the details. It is important that the user ensures the number entered is correct to avoid unnecessary information and to avoid wastage of money in case of paid lookups. It is equally important that one uses the right software while using this facility as there are certain websites which either do not provide the complete information or those which do not have a good database.

Although there are number of providers Intellius Inc is the largest provider for reverse cell phone lookup. Apart from the earlier mentioned reasons, people are also using this facility to get in touch with school friends or other friends whom they have not seen for years. One can easily debate that this is what some of the social networking sites also claim to do, but it needs to be remembered that the percentage of people being on social networking sites is less than of those who are available through reverse phone lookup software. It also serves a good purpose when you are troubled by crank calls or missed calls to get the details of the person using the number. There is a slight drawback also to this service as it can be seen as an invasion of privacy of individuals since all the details are available which an individual might not like to share with everyone.

Though this service is indeed a very helpful one, but care should be employed while using this service so that personal life of any individual is not affected.