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 02655 Osterville Barnstable County 508, 774
MA 02657 Provincetown Barnstable County 508, 774
MA 02659 South Chatham Barnstable County 508, 774
MA 02660 South Dennis Barnstable County 508, 774
MA 02661 South Harwich Barnstable County 508
MA 02662 South Orleans Barnstable County 508
MA 02663 South Wellfleet Barnstable County 508, 774
MA 02664 South Yarmouth Barnstable County 508, 774
MA 02666 Truro Barnstable County 508, 774
MA 02667 Wellfleet Barnstable 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.