U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
County directory

Andrew County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Andrew County.

County State ZIP Code City Area Codes
Andrew County MO 64421 Amazonia 660, 785, 816
Andrew County MO 64427 Bolckow 660, 816
Andrew County MO 64436 Cosby 816
Andrew County MO 64449 Fillmore 660, 816
Andrew County MO 64459 Helena 816
Andrew County MO 64480 Rea 816
Andrew County MO 64483 Rosendale 816
Andrew County MO 64485 Savannah 660, 816

Geographic Map of Andrew County

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.