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now that cell phones are in common use and many people do not even have home phones, and if they do their number may be unpublished.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 landlines, many numbers may show up without an identifying name and there are ways for callers to prevent their details from showing up. Reverse phone lookup services have stepped up to these changing times to offer a very timely service to modern phone users.
There are two typical uses for these directories.
Searching for Names
If you are getting calls from someone and only a number comes up on your ID, or you want to figure out cellular phone callers, reverse phone lookup services can assist in finding the name registered to the phone number of concern. Just by entering the number you will have access to whoever is behind the phone calls in question.
People needing such services include those wanting to identify a number constantly phoning their spouse or children's cell phone, since there is no phone book for cell phone numbers. Other people may use lookup directories when they need to identify a name registered to a home phone that is unlisted. If you have a number but are uncertain who it is connected to, a reverse phone lookup service can deliver the information.
Searching for Addresses
The other typical use is to locate an address for someone, whether you know the name of the person or not. Once you plug into the information connected with a specific phone number most directories will give other sorts of information as well, which may include the address of the home phone or an address associated with a cell phone number.
This may not be an everyday need for some people, but it does have its uses in quite a few situations. For instance, consider a parent desperate 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 lookup directory could quickly uncover addresses and names of places the child may be located.
More common circumstances may be searching for addresses to send out party invitations to your child's peers. If you have a phone number you can find their address and mail out the invitation without calling and tracking down other busy people.
Lookup websites can also give you access to other kinds of data, like 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 is a small charge for any legitimate reverse phone lookup website, but if your business or personal situation requires particular information it is money well spent in the end. The charge is required because this variety of information is not easy or completely free to research, collect, and protect, so distributing it on demand to others such as you must also collect a fee to account for these operational expenditures.
There likely will never be a phone book for cell phone numbers, and even if there were most likely many of the numbers would be unlisted as is the case with many home phone numbers right now. The best way to get access to such phone numbers is to give a minor charge either to do a single number lookup or to join a lookup service if you will be using the directory on a regular basis.