ZIP Code 04645

04645 is one of Maine's ZIP codes, delivering to addresses in Isle Au Haut, Knox County.

City: Isle Au Haut
County: Knox County
State: Maine
Prefix: 046xx

Where this code sits

04645 is part of the 046xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Isle Au Haut.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 04645 delivers to without sharing its boundary.

207 Area code 207

ZIP codes nearest 04645

The ZIP codes whose reference points sit closest to 04645.
ZIP code	Distance	Delivers to
ZIP code 04681	8.7 mi	Stonington, ME
ZIP code 04685	10 mi	Swans Island, ME
ZIP code 04863	11 mi	Vinalhaven, ME
ZIP code 04683	11 mi	Sunset, ME
ZIP code 04627	12 mi	Deer Isle, ME
ZIP code 04635	14 mi	Frenchboro, ME
ZIP code 04853	14 mi	North Haven, ME
ZIP code 04616	14 mi	Brooklin, ME

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 04645, plotted from its record coordinates.

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

Scope ZIP code 04645. 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.