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 03586 Sugar Hill Grafton County 603
NH 03588 Milan Coos County 603
NH 03589 Mount Washington Coos County 603
NH 03590 North Stratford Coos County 603, 802
NH 03592 Pittsburg Coos County 207, 468, 603, 802, 819, 873
NH 03593 Randolph Coos County 603
NH 03595 Twin Mountain Coos County 603
NH 03597 West Stewartstown Coos County 603, 802
NH 03598 Whitefield Coos County 603, 802
NH 03601 Acworth Sullivan County 603
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Geographic Map of New Hampshire

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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.