It used to be that everyone had a standard phone in their home and finding a phone number or address was a matter of opening the white pages and finding the name. Things have grown more complex now that cell phones are widely used and many people do not even have home phones, and if they do their number may be unpublished.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, some numbers may appear without an identifying name and there are ways for callers to block their name from coming up. Reverse phone lookup directories have stepped up to these changing demands to provide a very useful service to modern phone users.
There are two common uses for lookup directories.
Searching for Names
If you are receiving calls from someone and only a number is revealed on your caller ID, or you need to identify cellular phone callers, reverse phone lookup services can assist in finding the name registered to the number in question. Just by entering the number you will have access to the person who is initiating the bothersome phone calls.
People looking for lookup directories include those wanting to check up on a number constantly calling their spouse or children's cell phone, since there is no phone book for cell phone numbers. Others may use this when they need to know a name connected to a landline that may be unlisted. Anytime you have a phone number but don't know who it is connected to, a reverse phone lookup website can help.
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 associated with a specific phone number most services will deliver additional data as well, which includes the address of an landline or an address associated with a cell phone number.
This may not be a typical need for some people, but it does have its benefits in quite a few situations. For instance, consider a parent in a rush to track down a teenager who has run away or has not returned home well past curfew. If they can get access to numbers from the teenager's bedroom or cell phone a lookup directory could quickly reveal addresses and names of places the child may be at that time.
Other circumstances may be searching for addresses to send out party invitations to your child's peers. If you have a phone number you can get their address and mail out the invitation without calling and tracking down other busy family.
These services can also deliver access to other various types of information, like income brackets and previous addresses, and one site even gives a map with an rough pinpoint of the most current location.
There will be a small charge for any legitimate reverse phone lookup service, but if your business or personal situation requires particular data it is worth the money in the end. The charge is unavoidable because this kind of information is not easy or free to research, collect, and store, so distributing it on demand to people such as you must also collect a fee to make up for these working costs.
There likely will never be a public directory for cell phone numbers, and even if they were compiled most likely the majority of the numbers would be unlisted just like many landline numbers right now. The only way to gain access to these numbers is to put up a nominal fee either to do a single number lookup or to join a lookup service if you will need to access the directory long term.