Not long ago, everyone had a landline phone in their home and locating a phone number or address simply required opening the yellow pages and finding their name. This has become more complex now that cell phones are in common use and many people do not even have home phones, and if they do their number may be unpublished.

Even with the invention of caller ID on most home phones, many 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 demands to provide a very valuable service to modern phone users.

There are two common functions for these services.

Locating Names

If you are getting calls from someone and only a number shows on your caller ID, or you need to identify cellular phone callers, reverse phone lookup services can assist in finding the name listed to the number in question. Just by entering the number you will have access to the person who is initiating the calls of concern.

People needing such services include those who need to identify a number often phoning their spouse or children's cell phone, since there is no phone book for cell phone numbers. Others may use this when they want to know a name connected to a landline that is unpublished. If you have a phone number but don't know who it belongs to, a reverse phone lookup website can deliver the information.

Locating Addresses

The other common purpose is to identify an address for someone, whether you know their name or not. Once you gain access to the contact information connected with a certain number most services will give additional data as well, which may include the address of an landline or an address listed to a cell phone number.

This may not be a common need for some people, but it does have its uses in quite a few situations. For instance, consider a parent desperate to locate a teenager who has run off or has not returned home 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 classmates. If you have the phone number you can get their address and easily deliver the invite without calling or tracking down other busy people.

These services can also give you access to other sorts of information, such as income brackets or previous addresses, and one site even gives a map with an general pinpoint of the most current location.

There is a nominal price for any up to date reverse phone lookup directory, but if your business or personal life demands particular information it is more than worth the payoff in the long run. The fee is unavoidable because this sort of information is not simple or free to research, pull together, and store, so dispensing it on demand to people such as you must also collect a fee to account for these operational costs.

There probably will never be a phone book for cellular numbers, and even if they were compiled it is probable many of the numbers would be unlisted as is the case with many home phone numbers today. The only way to gain access to such numbers is to put up a small charge either to do a single phone number search or to join a lookup directory if you will be using the service on a regular basis.