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 01240 Lenox Berkshire County 413
MA 01242 Lenox Dale Berkshire County 413
MA 01243 Middlefield Hampshire County 413
MA 01244 Mill River Berkshire County 413
MA 01245 Monterey Berkshire County 413
MA 01247 North Adams Berkshire County 413, 802
MA 01252 North Egremont Berkshire County 413
MA 01253 Otis Berkshire County 413
MA 01254 Richmond Berkshire County 413, 518, 838
MA 01255 Sandisfield Berkshire County 413, 860, 959
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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.