United States postal codes (ZIP codes)
A US ZIP code has 5 digits. The first digit groups a region; the next ones narrow the area and the post office. 41,490 postal codes.
Anatomy of a postal code
A US ZIP code has 5 digits. The first digit groups a region; the next ones narrow the area and the post office.
RegionThe first digit identifies a broad group of states.
AreaDigits 2 and 3 narrow the postal processing area.
OfficeThe last 2 digits identify the delivery office.
Example: 10001.
Main cities
Regions