ZIP Code 92310

92310 is one of California's ZIP codes, delivering to addresses in Fort Irwin, San Bernardino County.

City: Fort Irwin
County: San Bernardino County
State: California
Prefix: 923xx

Where this code sits

92310 is part of the 923xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fort Irwin.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 92310 delivers to without sharing its boundary.

ZIP codes nearest 92310

The ZIP codes whose reference points sit closest to 92310.
ZIP code	Distance	Delivers to
ZIP code 92398	26 mi	Yermo, CA
ZIP code 92365	26 mi	Newberry Springs, CA
ZIP code 92327	29 mi	Daggett, CA
ZIP code 92312	31 mi	Barstow, CA
ZIP code 92311	32 mi	Barstow, CA
ZIP code 92347	36 mi	Hinkley, CA
ZIP code 92309	36 mi	Baker, CA
ZIP code 92338	48 mi	Ludlow, CA

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 92310, plotted from its record coordinates.

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

Scope ZIP code 92310. 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.