That is a very good question! I am sure you have heard the following phrases: "Reverse Phone Number", "Reverse Phone Directory", "Reverse Phonebook", etc. These phrases/words basically mean the same thing – the reverse of a phone book.

We all know what a phonebook or phone directory is, correct? It is a book that lists phone numbers for people and businesses. It is a “directory” of phone numbers and names. You can search the phonebook or “directory” to find the phone number of your favorite Pizza restaurant. To do this you simply open the phonebook find the name of the Pizza restaurant (typically in alphabetical order) and next to the name will be the phone number. This is how we use a phonebook.

A Reverse Phone Directory is exactly the same thing except backwards. It is still a phonebook or directory of people, names, and phone numbers where you can search and lookup phone numbers. The only difference between this and the regular phone book is that instead of finding the name first to lookup the phone number you find the phone number first to lookup the name. A reverse phone directory is typically used nowadays due to the fact that we all have cell phones with caller ID. If a call comes in to your mobile phone and you do not recognize the number, you could search a reverse phone directory to find the name that belongs to that number. Reverse phone directories are not only used for looking up people but it can also be used to find businesses as well.

Here at the National Cellular Directory you can run a reverse phone lookup by using our free reverse phone directory. Our reverse phone directory only searches people and their cell phone numbers. If you want to search business you will have to use other reverse phone directories on the world wide web.