ZIP Code 89421

89421 is one of Nevada's ZIP codes, delivering to addresses in Mc Dermitt, Humboldt County.

City: Mc Dermitt
County: Humboldt County
State: Nevada
Prefix: 894xx

Where this code sits

89421 is part of the 894xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mc Dermitt.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 89421 delivers to without sharing its boundary.

775 Area code 775

ZIP codes nearest 89421

The ZIP codes whose reference points sit closest to 89421.
ZIP code	Distance	Delivers to
ZIP code 89425	24 mi	Orovada, NV
ZIP code 89426	33 mi	Paradise Valley, NV
ZIP code 97710	44 mi	Fields, OR
ZIP code 89404	49 mi	Denio, NV
ZIP code 89446	62 mi	Winnemucca, NV
ZIP code 97902	66 mi	Arock, OR
ZIP code 97910	66 mi	Jordan Valley, OR
ZIP code 89445	70 mi	Winnemucca, NV

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 89421, plotted from its record coordinates.

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

Scope ZIP code 89421. 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.