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 03745 Cornish Sullivan County 603, 802
NH 03746 Cornish Flat Sullivan County 603
NH 03748 Enfield Grafton County 603
NH 03749 Enfield Center Grafton County 603
NH 03750 Etna Grafton County 603
NH 03751 Georges Mills Sullivan County 603
NH 03752 Goshen Sullivan County 603
NH 03753 Grantham Sullivan County 603
NH 03754 Guild Sullivan County 603
NH 03755 Hanover Grafton County 603, 802
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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.