códigos postales
The world's postal index

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.

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