ZIP Code 03230

03230 is one of New Hampshire's ZIP codes, delivering to addresses in Danbury, Merrimack County.

City: Danbury
County: Merrimack County
State: New Hampshire
Prefix: 032xx

Where this code sits

03230 is part of the 032xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Danbury.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 03230 delivers to without sharing its boundary.

603 Area code 603

ZIP codes nearest 03230

The ZIP codes whose reference points sit closest to 03230.
ZIP code	Distance	Delivers to
ZIP code 03287	4.9 mi	Wilmot, NH
ZIP code 03240	6.3 mi	Grafton, NH
ZIP code 03231	7.1 mi	East Andover, NH
ZIP code 03243	7.1 mi	Hill, NH
ZIP code 03233	7.1 mi	Elkins, NH
ZIP code 03216	7.2 mi	Andover, NH
ZIP code 03257	8.9 mi	New London, NH
ZIP code 03284	9.0 mi	Springfield, NH

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 03230, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 03230. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.