ZIP Code 49903

49903 is one of Michigan's ZIP codes, delivering to addresses in Amasa, Iron County.

City: Amasa
County: Iron County
State: Michigan
Prefix: 499xx

Where this code sits

49903 is part of the 499xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Amasa.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 49903 delivers to without sharing its boundary.

906 Area code 906

ZIP codes nearest 49903

The ZIP codes whose reference points sit closest to 49903.
ZIP code	Distance	Delivers to
ZIP code 49920	9.7 mi	Crystal Falls, MI
ZIP code 49935	13 mi	Iron River, MI
ZIP code 49902	14 mi	Alpha, MI
ZIP code 49964	14 mi	Stambaugh, MI
ZIP code 49927	14 mi	Gaastra, MI
ZIP code 49915	15 mi	Caspian, MI
ZIP code 49815	19 mi	Channing, MI
ZIP code 49881	21 mi	Sagola, MI

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 49903, plotted from its record coordinates.

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

Scope ZIP code 49903. 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.