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.

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Massachusetts ZIP Codes

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

State ZIP Code City County Area Codes
MA 02556 North Falmouth Barnstable County 508, 774
MA 02557 Oak Bluffs Dukes County 508, 774
MA 02558 Onset Plymouth County 508, 774
MA 02559 Pocasset Barnstable County 508, 774
MA 02561 Sagamore Barnstable County 508, 774
MA 02562 Sagamore Beach Barnstable County 508, 774
MA 02563 Sandwich Barnstable County 508, 774
MA 02564 Siasconset Nantucket County 508, 774
MA 02565 Silver Beach Barnstable County 508
MA 02568 Vineyard Haven Dukes 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.