ZIP Code 03445

03445 is one of New Hampshire's ZIP codes, delivering to addresses in Sullivan, Cheshire County.

City: Sullivan
County: Cheshire County
State: New Hampshire
Prefix: 034xx

Where this code sits

03445 is part of the 034xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Sullivan.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 03445 delivers to without sharing its boundary.

603 Area code 603

ZIP codes nearest 03445

The ZIP codes whose reference points sit closest to 03445.
ZIP code	Distance	Delivers to
ZIP code 03457	3.6 mi	Nelson, NH
ZIP code 03448	4.6 mi	Gilsum, NH
ZIP code 03431	5.3 mi	Keene, NH
ZIP code 03435	5.9 mi	Keene, NH
ZIP code 03450	6.7 mi	Harrisville, NH
ZIP code 03455	6.9 mi	Marlborough, NH
ZIP code 03464	7.0 mi	Stoddard, NH
ZIP code 03456	9.3 mi	Marlow, 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 03445, plotted from its record coordinates.

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

Scope ZIP code 03445. 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.