Not long ago, everyone had a standard phone in their home and locating a phone number or address simply required opening the yellow pages and finding the 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 home phones, some numbers may come up without an identifying name and there are ways for callers to block their name from coming 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 common uses for these services.

Finding Names

If you are getting calls from someone and only a number shows on your ID, or you need to figure out cell phone callers, reverse phone lookup directories can help you find out the name registered to the phone number of concern. Just by typing in the number you will be able to identify whoever is behind those calls of concern.

People in search of such services include those wanting to identify a number often phoning their spouse or children's cell phone, since there is no accessible directory for cell phone numbers. Other people may use this when they want to identify a name listed to a landline that is unpublished.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 website can deliver the information.

Finding Addresses

The other common function is to find an address for someone, whether you know their name or not. Once you find the information connected with a certain number most directories will deliver additional information as well, which includes the address of the landline or an address connected to a cell phone number.

This may not be a common need for some people, but it does have its uses in some situations. For instance, consider a parent desperate to find a teenager who has run away or is still out well past curfew. If they can come up with numbers from the teenager's belongings or cell phone a reverse phone lookup could quickly reveal addresses as well as names of locations the teenager may be at that time.

Other circumstances may be looking for addresses to send 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 or tracking down other busy people.

Lookup directories can also deliver access to other kinds of information, including income brackets or address histories, and one site even gives a map with an rough pinpoint of the most current location.

There will be a minor fee for any legitimate reverse phone lookup service, but if your business or personal situation demands particular information it is more than worth the payoff in the end. The fee is unavoidable because this variety of information is not simple or free to research, pull together, and save, so issuing it on demand to people like you must also include a charge to make up for these serviceable expenditures.

There probably will never be a phone book for cellular numbers, and even if there were most likely a lot of the numbers would be unlisted just like many home phone numbers right now. The only way to gain access to these numbers is to put up a small charge either to complete a one time phone number search or to join a lookup directory if you will need to access the directory long term.