ZIP Code 63556

63556 is one of Missouri's ZIP codes, delivering to addresses in Milan, Sullivan County.

City: Milan
County: Sullivan County
State: Missouri
Prefix: 635xx

Where this code sits

63556 is part of the 635xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Milan.

Milan Missouri ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63556 delivers to without sharing its boundary.

660 Area code 660

ZIP codes nearest 63556

The ZIP codes whose reference points sit closest to 63556.
ZIP code	Distance	Delivers to
ZIP code 64646	10 mi	Humphreys, MO
ZIP code 63560	11 mi	Pollock, MO
ZIP code 64630	11 mi	Browning, MO
ZIP code 63545	11 mi	Green City, MO
ZIP code 64641	14 mi	Galt, MO
ZIP code 64645	14 mi	Harris, MO
ZIP code 63544	15 mi	Green Castle, MO
ZIP code 63566	15 mi	Winigan, 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 63556, plotted from its record coordinates.

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

Scope ZIP code 63556. 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.