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 01527 Millbury Worcester County 508, 774
MA 01529 Millville Worcester County 401, 508, 774
MA 01531 New Braintree Worcester County 351, 413, 508, 774, 978
MA 01532 Northborough Worcester County 351, 508, 774, 978
MA 01534 Northbridge Worcester County 508, 774
MA 01535 North Brookfield Worcester County 508, 774
MA 01536 North Grafton Worcester County 508, 774
MA 01537 North Oxford Worcester County 508, 774
MA 01538 North Uxbridge Worcester County 508, 774
MA 01540 Oxford Worcester County 508, 774
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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.