ZIP Code 63648

63648 is one of Missouri's ZIP codes, delivering to addresses in Irondale, Washington County.

City: Irondale
County: Washington County
State: Missouri
Prefix: 636xx

Where this code sits

63648 is part of the 636xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Irondale.

Irondale Missouri ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63648 delivers to without sharing its boundary.

ZIP codes nearest 63648

The ZIP codes whose reference points sit closest to 63648.
ZIP code	Distance	Delivers to
ZIP code 63631	5.1 mi	Caledonia, MO
ZIP code 63660	6.1 mi	Mineral Point, MO
ZIP code 63653	6.3 mi	Leadwood, MO
ZIP code 63624	7.6 mi	Bismarck, MO
ZIP code 63622	9.3 mi	Belgrade, MO
ZIP code 63628	10 mi	Bonne Terre, MO
ZIP code 63601	12 mi	Park Hills, MO
ZIP code 63623	12 mi	Belleview, MO

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 63648, plotted from its record coordinates.

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

Scope ZIP code 63648. 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.