It used to be that everyone had a landline phone in their home and searching for a phone number or address simply required opening the phone book and searching for their name. Things have grown more complex now that cell phones are widely used 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, a lot of numbers may appear without an identifying name and there are ways for callers to prevent their name from showing up. Reverse phone lookup services have stepped up to these changing times to provide a very valuable service to modern phone users.

There are two common functions for these directories.

Locating Names

If you are receiving calls from someone and only a number is revealed on your ID, or you need to identify cell phone callers, reverse phone lookup directories can assist in finding the name registered to the number in question. Just by typing in the phone number you will be able to identify the person who is responsible for those calls of concern.

People in search of this service include those who need to check up on a number constantly calling their spouse or teenager's cell phone, since there is no phone book for cell phone numbers. Others may use this when they need to find a name listed to a landline that is unpublished. Whenever you have a phone number but don't know who it is connected to, a reverse phone lookup directory can deliver the information.

Locating Addresses

The other common use is to identify an address for someone, whether you know the name of the person or not. Once you plug into the information associated with a specific phone number most services will deliver other sorts of data as well, which may include the address of an home phone or the address listed to a cell phone number.

This may not be a typical need for most people, but it does have its benefits in some situations. Such as a parent in a rush to locate a teenager who has run away or is still out long after curfew. If they can find phone numbers from the teenager's bedroom or cell phone a lookup directory could quickly tell them 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 or tracking down other busy family.

Lookup directories can also give you access to other sorts of information, like income brackets or address histories, and one site even gives a map with an estimated pinpoint of the most current location.

There is a small charge for any legitimate reverse phone lookup website, but if your business or personal life requires certain data it is money well spent in the end. The charge is necessary because this kind of information is not simple or free to research, pull together, and protect, so dispensing it on demand to others such as you must also include a fee to cover such working expenditures.

There likely will never be a public directory for cell phone numbers, and even if they were compiled it is probable many of the numbers would be unlisted just like many home phone numbers today. The only way to obtain access to such numbers is to give a minor charge either to do a one time number search or to join a lookup service if you will need to access the service long term.