It used to be that everyone had a landline phone in their home and locating a phone number or address simply required opening the phone book and locating their name. It is often more complicated now that cell phones are in common use and many people do not even have landlines, and if they do their number may be unpublished.

Even with the widespread use of caller ID on most home phones, some numbers may appear without an identifying name and there are ways for callers to prevent their name from appearing. Reverse phone lookup directories have stepped up to these changing demands to offer a very timely service to resourceful phone users.

There are two typical uses for these directories.

Locating Names

If you are receiving calls from someone and only a number shows on your caller ID, or you need to figure out cellular phone callers, reverse phone lookup directories can assist in finding the name registered to the number in question. Just by entering the phone number you will have access to whoever is responsible for the phone calls in question.

People needing lookup directories include those wanting to check up on a number frequently texting their spouse or teenager's cell phone, since there is no accessible directory for cell phone numbers. Other people may use this when they want to identify a name registered to a landline that may be unpublished. If you have a phone number but aren't sure who it belongs to, a reverse phone lookup directory can deliver the information.

Finding Addresses

The other typical purpose is to identify an address for someone, whether you know the name of the person or not. Once you find the contact information linked with a specific phone number most directories will give other sorts of data as well, such as the address of the landline or an address associated with a cell phone number.

This may not be an everyday need for some people, but it does have its benefits in quite a few situations. For instance, consider a parent desperate to track down a teenager who has run away or has not returned home well past curfew. If they can find phone numbers from the teenager's bedroom or cell phone a reverse phone lookup could quickly tell them addresses as well as names of places the teenager may be at that time.

More common situations may be looking for addresses to mail out party invitations to your child's friends. If you have their phone number you can get their address and mail out the invitation without calling or tracking down other busy parents.

Lookup directories can also deliver a connection to other kinds of information, such as income brackets or previous addresses, and one site even gives a map with an rough pinpoint of where the home or business is located.

There is a small charge for any legitimate reverse phone lookup directory, but if your business or personal life demands particular information it is more than worth the payoff in the end. The charge is unavoidable because this variety of information is not easy or completely free to research, collect, and protect, so issuing it as needed to consumers such as you must also collect a charge to cover these serviceable costs.

There more than likely will never be a phone book for cellular numbers, and even if they were compiled most likely a lot of the numbers would be unpublished as is the case with many home phone numbers today. The only way to gain access to such phone numbers is to put up a small charge either to do a one time phone number lookup or to join a lookup directory if you will be using the service long term.