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

New Hampshire ZIP Codes

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

State ZIP Code City County Area Codes
NH 03448 Gilsum Cheshire County 603
NH 03449 Hancock Hillsborough County 603
NH 03450 Harrisville Cheshire County 603
NH 03451 Hinsdale Cheshire County 603, 802
NH 03452 Jaffrey Cheshire County 603
NH 03455 Marlborough Cheshire County 603
NH 03456 Marlow Cheshire County 603
NH 03457 Nelson Cheshire County 603
NH 03458 Peterborough Hillsborough County 603
NH 03461 Rindge Cheshire County 351, 603, 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.