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 03602 Alstead Cheshire County 603
NH 03603 Charlestown Sullivan County 603, 802
NH 03604 Drewsville Cheshire County 603
NH 03605 Lempster Sullivan County 603
NH 03607 South Acworth Sullivan County 603
NH 03608 Walpole Cheshire County 603, 802
NH 03609 North Walpole Cheshire County 603, 802
NH 03740 Bath Grafton County 603, 802
NH 03741 Canaan Grafton County 603
NH 03743 Claremont Sullivan 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.