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now that cell phones are widely used and many people do not even have landlines, and if they do their number may be unpublished.

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

There are two typical functions for lookup directories.

Finding Names

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

People in search of lookup directories include those wanting to identify a number often phoning their spouse or teenager's cell phone, since there is no accessible directory for cell phone numbers. Other people may use this when they need to identify a name registered to a landline that is unpublished. If you have a number but are uncertain who it is connected to, a reverse phone lookup website can assist you.

Finding Addresses

The other common use is to find an address for someone, whether you know their name or not. Once you find the information associated with a specific phone number most directories will deliver additional data as well, which includes the address of an landline or the 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. 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 come up with numbers from the teenager's belongings or cell phone a lookup directory could quickly tell them addresses as well as names of locations the teenager may be located.

More common circumstances may be looking for addresses to mail out party invitations to your child's friends. If you have a phone number you can get their address and get the invite in the mail without calling and tracking down other busy people.

These services can also deliver a connection to other kinds of information, including 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 will be a minor fee for any legitimate reverse phone lookup service, but if your business or personal situation requires particular information it is more than worth the payoff in the end. The fee is necessary because this sort of information is not easy or completely free to research, collect, and protect, so issuing it as needed to others such as you must also collect a fee to account for such serviceable costs.

There more than likely will never be a public directory for cellular numbers, and even if they were compiled most likely the majority of the numbers would be unpublished just like many home phone numbers today. The best way to obtain access to such numbers is to give a minor charge either to complete a single number search or to join a lookup service if you will be using the directory on a regular basis.