It used to be that everyone had a landline phone in their home and locating a number or address was a matter of opening the phone book and finding their name. This has become more complex now that cell phones are widely used and many people do not even have home phones, and if they do their number may be unlisted.

Even with the development of caller ID on most landlines, a lot of numbers may come up without an identifying name and there are ways for callers to block their details from showing up. Reverse phone lookup directories have responded to these changing times to offer a very timely service to modern phone users.

There are two typical functions for these directories.

Locating Names

If you are receiving calls from someone and only a number is revealed on your caller ID, or you need to identify cellular phone callers, reverse phone lookup services can help you find out the name listed to the phone number of concern. Just by entering the phone number you will be able to identify the person who is responsible for the phone calls in question.

People needing lookup directories include those wanting to check up on a number frequently phoning their spouse or teenager's cell phone, since there is no public directory for cell phone numbers. Others may use this when they want to identify a name registered to a home phone that is unpublished. Whenever you have a phone number but don't know who it belongs to, a reverse phone lookup service can deliver the information.

Finding Addresses

another typical function is to locate an address for someone, whether you know the name of the person or not. Once you find the contact information connected with a particular number most services will deliver other sorts of information as well, such as the address of an home phone or an address connected to a cell phone number.

This may not be a common need for most people, but it does have its benefits in quite a few situations. For instance, consider 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 tell them addresses as well as names of places the teenager may be at that time.

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

These services can also give you a connection to other sorts of data, 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 minor fee for any up to date reverse phone lookup service, but if your business or personal life requires certain information it is money well spent in the long run. The fee is necessary because this variety of information is not simple or completely free to research, collect, and store, so distributing it as needed to people like you must also come with a fee to account for such working costs.

There more than likely will never be a phone book for cell phone numbers, and even if there were most likely the majority of the numbers would be unpublished as is the case with many landline numbers right now. The only way to get access to such phone numbers is to put up a small charge either to do a one time number lookup or to join a lookup directory if you will need to access the directory on a regular basis.