ZIP Code 40423

40423 is one of Kentucky's ZIP codes, delivering to addresses in Danville, Boyle County.

City: Danville
County: Boyle County
State: Kentucky
Prefix: 404xx

Where this code sits

40423 is part of the 404xx range, the group of codes handled by one mail processing centre. Danville is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Danville page.

Danville Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 40423 delivers to without sharing its boundary.

859 Area code 859

ZIP codes nearest 40423

The ZIP codes whose reference points sit closest to 40423.
ZIP code	Distance	Delivers to
ZIP code 40422	0.2 mi	Danville, KY
ZIP code 40440	4.7 mi	Junction City, KY
ZIP code 40310	7.5 mi	Burgin, KY
ZIP code 40410	8.2 mi	Bryantsville, KY
ZIP code 40484	9.5 mi	Stanford, KY
ZIP code 40444	9.6 mi	Lancaster, KY
ZIP code 40464	9.7 mi	Parksville, KY
ZIP code 40452	10 mi	Mitchellsburg, KY

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 40423, plotted from its record coordinates.

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

Scope ZIP code 40423. 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.