It used to be that everyone had a landline phone in their home and finding a phone number or address was a matter of opening the phone book and searching for the name. It is often more difficult now that cell phones are widely used and many people do not even have landlines, and if they do their number may be unpublished.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 invention of caller ID on most landlines, some numbers may show up without an identifying name and there are ways for callers to prevent their name from coming up. Reverse phone lookup directories have stepped up to these changing demands to offer a very valuable service to resourceful phone users.

There are two common functions for these directories.

Locating Names

If you are receiving calls from someone and only a number comes up on your ID, or you want to figure out cell phone callers, reverse phone lookup directories can help you find out the name registered to the number of concern. Just by typing in the number you will have access to the person who is responsible for the calls of concern.

People needing lookup directories include those wanting to check up on a number often calling 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 Others may use this when they want to identify a name registered to a landline that may be unpublished. Whenever you have a number but don't know who it belongs to, a reverse phone lookup service can help.

Locating Addresses

another common purpose is to find an address for someone, whether you know their name or not. Once you gain access to the contact information associated with a particular number most directories will give additional data as well, which includes the address of an home phone or an address listed to a cell phone number.

This may not be a typical need for some people, but it does have its benefits in some situations. Such as a parent needing to find a teenager who has run off or has not returned home well past curfew. If they can come up with numbers from the teenager's bedroom or cell phone a reverse phone lookup could quickly uncover 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 peers. If you have their phone number you can find their address and easily deliver the invite without calling or tracking down other busy parents.

These services can also deliver a connection to other kinds of information, such as income brackets and previous addresses, and one site even gives a map with an estimated pinpoint to the business or home's location.

There is a nominal price for any up to date reverse phone lookup service, but if your business or personal situation demands certain information it is worth the money in the long run. The charge is necessary because this sort of information is not easy or completely free to research, pull together, and protect, so distributing it immediately to others like you must also collect a fee to make up for these operational costs.

There probably will never be a phone book for cell phone numbers, and even if they were compiled it is probable many of the numbers would be unpublished just like many landline numbers right now. The best way to obtain access to such numbers is to pay a small charge either to do a single number lookup or to join a lookup directory if you will need to access the directory on a regular basis.