Conduct a reverse phone lookup of an unknown phone number!
There are a variety of reasons why people want to do a phone number search to find out who is calling them about a particular subject. It may be for a legitimate reason, although not always pleasant. Regardess of the reason, you want to ensure you do not give out your personal information on the phone to a stranger.
Conducting a phone number search can verify if the caller is in fact who he or she says they are. You may have a desire to clear up the matter if it is of a legal nature. Likewise, you may do a phone number search and learn that the caller is not being entirely truthful about their intentions. You will then feel more comfortable about ignoring their calls or taking further action to be removed from their call list. It may be a simple case of telephone marketing.