The basic 5-digit format was first introduced in 1963 and laterĮxtended to add an additional 4 digits after a dash to form a
The term ZIP stands for Zone Improvement Plan. Some still refer to ZIP codes as US postal codes.
ZIP codes near me are shown on the map above. US ZIP codes are a type of postal code used within the United States to help the United States Postal Service (USPS) route mail more efficiently.
