ZIP Code 99001

99001 is one of Washington's ZIP codes, delivering to addresses in Airway Heights, Spokane County.

City: Airway Heights
County: Spokane County
State: Washington
Prefix: 990xx

Where this code sits

99001 is part of the 990xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Airway Heights.

Airway Heights Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99001 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99001

The ZIP codes whose reference points sit closest to 99001.
ZIP code	Distance	Delivers to
ZIP code 99224	2.2 mi	Spokane, WA
ZIP code 99011	3.0 mi	Fairchild Air Force Base, WA
ZIP code 99022	5.6 mi	Medical Lake, WA
ZIP code 99014	5.8 mi	Four Lakes, WA
ZIP code 99020	7.0 mi	Marshall, WA
ZIP code 99201	7.4 mi	Spokane, WA
ZIP code 99210	7.5 mi	Spokane, WA
ZIP code 99211	7.5 mi	Spokane, WA

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 99001, plotted from its record coordinates.

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

Scope ZIP code 99001. 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.