Do you often receive prank calls from those who are out to have fun? What would you do when that happens? What happens when you pick the phone up only to find them hanging up on you? Well, you can actually check to see if the other person on the other end could be just your little niece or nephew having fun with their aunts and uncles or it could be someone who could be a threat to your home. All you need to do is to go online to the National Phone Registry and lookup any phone number from landlines, cell phones and even unlisted phone numbers. These website contains a database of numbers and information about the owner's number, particulars like address, full name, background information and more. Even if it could be a missed number, a phone lookup service can be helpful in case you need to make an emergency call back to the person.