ZIP Code 42503

42503 is one of Kentucky's ZIP codes, delivering to addresses in Somerset, Pulaski County.

City: Somerset
County: Pulaski County
State: Kentucky
Prefix: 425xx

Where this code sits

42503 is part of the 425xx range, the group of codes handled by one mail processing centre. Somerset is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Somerset page.

Somerset Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42503 delivers to without sharing its boundary.

606 Area code 606

ZIP codes nearest 42503

The ZIP codes whose reference points sit closest to 42503.
ZIP code	Distance	Delivers to
ZIP code 42501	3.9 mi	Somerset, KY
ZIP code 42564	4.9 mi	West Somerset, KY
ZIP code 42502	6.2 mi	Somerset, KY
ZIP code 42553	6.9 mi	Science Hill, KY
ZIP code 42533	7.2 mi	Ferguson, KY
ZIP code 42567	8.7 mi	Eubank, KY
ZIP code 42544	13 mi	Nancy, KY
ZIP code 42516	14 mi	Bethelridge, 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 42503, plotted from its record coordinates.

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

Scope ZIP code 42503. 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.