ZIP Code 63645

63645 is one of Missouri's ZIP codes, delivering to addresses in Fredericktown, Madison County.

City: Fredericktown
County: Madison County
State: Missouri
Prefix: 636xx

Where this code sits

63645 is part of the 636xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fredericktown.

Fredericktown Missouri ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63645 delivers to without sharing its boundary.

ZIP codes nearest 63645

The ZIP codes whose reference points sit closest to 63645.
ZIP code	Distance	Delivers to
ZIP code 63655	9.9 mi	Marquand, MO
ZIP code 63651	13 mi	Knob Lick, MO
ZIP code 63632	14 mi	Cascade, MO
ZIP code 63621	15 mi	Arcadia, MO
ZIP code 63662	16 mi	Patton, MO
ZIP code 63650	17 mi	Ironton, MO
ZIP code 63637	19 mi	Doe Run, MO
ZIP code 63934	19 mi	Clubb, 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 63645, plotted from its record coordinates.

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

Scope ZIP code 63645. 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.