It used to be that everyone had a landline phone in their home and finding a number or address was a matter of opening the white pages and finding their name. It is often more complex now that cell phones are in common use and many people do not even have landlines, and if they do their number may be unlisted.

Even with the development of caller ID on most landlines, some numbers may show up without an identifying name and there are ways for callers to block their name from coming up. Reverse phone lookup services have stepped up to these changing demands to provide a very useful service to resourceful phone users.

There are two common functions for these directories.

Searching for Names

If you are receiving calls from someone and only a number comes up on your caller ID, or you need to figure out cellular phone callers, reverse phone lookup directories can help you find out the name listed to the number of concern. Just by typing in the phone number you will be able to identify whoever is behind those phone calls in question.

People in search of such services include those who need to check up on a number constantly phoning their spouse or children's cell phone, since there is no public directory for cell phone numbers. Others may use this when they need to find a name registered to a landline that is unlisted. If you have a number but are uncertain who it belongs to, a reverse phone lookup service can help.

Searching for Addresses

another typical use is to locate an address for someone, whether you know the name of the person or not. Once you plug into the information linked with a particular phone number most directories will deliver additional data as well, such as the address of the landline or the address connected to a cell phone number.

This may not be a common need for some people, but it does have its uses in some situations. For example, take a parent in a rush to find a teenager who has run off or is still out long after curfew. If they can come up with numbers from the teenager's bedroom or cell phone a reverse phone lookup could quickly uncover addresses and names of places the teenager may be located.

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

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

There is a minor fee for any up to date reverse phone lookup directory, but if your business or personal life requires particular information it is worth the money in the long run. The fee is necessary because this kind of information is not easy or free to research, collect, and save, so dispensing it immediately to people such as you must also collect a fee to cover these operational costs.

There probably will never be a phone book for cellular numbers, and even if they were compiled it is probable a lot of the numbers would be unlisted just like many landline numbers today. The only way to obtain access to such numbers is to put up a minor fee either to complete a single number search or to join a lookup service if you will need to access the service on a regular basis.