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 03216 Andover Merrimack County 603
NH 03217 Ashland Grafton County 603
NH 03218 Barnstead Belknap County 603
NH 03220 Belmont Belknap County 603
NH 03221 Bradford Merrimack County 603
NH 03222 Bristol Grafton County 603
NH 03223 Campton Grafton County 603
NH 03224 Canterbury Merrimack County 603
NH 03225 Center Barnstead Belknap County 603
NH 03226 Center Harbor Belknap County 603
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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.