Living in the States has many advantages. They have an online website that allows anyone to do a Reverse Phone Lookup on any phone number, from a data base of numbers. If you receive calls, be it a prank or even a number that you can't really remember who that was, you can actually enter the number on the search bar and click on the search button. That will carry the information of the owner of the number. This is excellent for some of those who do no carry their mobile phones with them as well as those who work in high security departments and medical centers. If the number is unfamiliar to them all they need to do is to search it online. Search no further for that misplaced address book. Search online instead!