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
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State directory

Massachusetts ZIP Codes

Complete postal directory, details, and geographic map for the State of Massachusetts.

State ZIP Code City County Area Codes
MA 01379 Wendell Franklin County 351, 413, 978
MA 01380 Wendell Depot Franklin County 351, 413, 978
MA 01420 Fitchburg Worcester County 351, 978
MA 01430 Ashburnham Worcester County 351, 978
MA 01431 Ashby Middlesex County 351, 603, 978
MA 01432 Ayer Middlesex County 351, 978
MA 01434 Devens Worcester County 351, 978
MA 01436 Baldwinville Worcester County 351, 978
MA 01438 East Templeton Worcester County 351, 978
MA 01440 Gardner Worcester County 351, 978
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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.