A five-digit number generally known as a ZIP code is important in making sure your package is delivered; it identifies a certain postal delivery area in the United States. There is also another ...

A postal code is a five digit code used to help postal services deliver mail and packages. Here's what the numbers mean and how they determine yours.

The map is based on five-digit ZIP code pairs rather than current three-digit pairs, which USPS says "will be updated as needed to communicate any new information." ...