Answering a mysterious call with nothing but silence on the phone can be unnerving. Vulgar or harassing phone calls are even worse and can be extremely frightening. You might have Caller I.D, which brings some level of comfort, but if you don't know who the phone number belongs to, it ultimately won't do you much good knowing a random number.

What you may not have known is that you can take that number and easily find out an owner and their address to go with it. While the name might not mean much to you, the address could potentially tell you a lot.

By inputting the area code and 7-digit phone number that reared its head on your call display, you can information like the name and address of the phone's owner, even their phone carrier, whom the information is actually gathered from.

Not only are the listings on these sites extensive, reaching into the hundreds of millions of records, but they also include unlisted numbers, meaning no matter how sly your mysterious caller may think he or she is, they won't be able to hide their identity from you.

A final note that these sites will cost you a small fee for their services. They pay to acquire their data directly to the phone companies, as well as the other costs associated with maintaining their servers, etc. These costs are very fair and great value for the service. You'll even get your money back if they can't find any info on the number you look up, which is unlikely, but the guarantee is there nonetheless, so you really have nothing to lose but those worries over strange callers.