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 01730 Bedford Middlesex County 339, 351, 781, 978
MA 01731 Hanscom AFB Middlesex County 339, 351, 781, 978
MA 01740 Bolton Worcester County 351, 978
MA 01741 Carlisle Middlesex County 339, 351, 781, 978
MA 01742 Concord Middlesex County 339, 351, 781, 978
MA 01745 Fayville Worcester County 508, 774
MA 01746 Holliston Middlesex County 508, 774
MA 01747 Hopedale Worcester County 508, 774
MA 01748 Hopkinton Middlesex County 508, 774
MA 01749 Hudson Middlesex County 351, 508, 774, 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.