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
All states and U.S. territories
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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 03818 Conway Carroll County 603
NH 03819 Danville Rockingham County 603
NH 03820 Dover Strafford County 207, 603
NH 03821 Dover Strafford County 603
NH 03822 Dover Strafford County 603
NH 03823 Madbury Strafford County 603
NH 03824 Durham Strafford County 603
NH 03825 Barrington Strafford County 603
NH 03826 East Hampstead Rockingham County 603
NH 03827 East Kingston Rockingham 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.