Find the last 4 digits (ZIP+4) for an address in 94528

ZIP 94528, Diablo, CA is filled in. Just type the street address.

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ZIP Code 94528 – Diablo, CA

Diablo, California · Contra Costa County · Pacific time

ZIP code94528
CityDiablo
StateCalifornia
CountyContra Costa County
Population1,049
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area1.15 sq mi
Center (lat, long)37.8415, -121.9582

Area codes in this area

925

These are the area codes that most often serve ZIP 94528 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

94526 Danville · 2.3 mi94507 Alamo · 2.8 mi94506 Danville · 3.9 mi94570 Moraga · 4.4 mi94517 Clayton · 4.9 mi94583 San Ramon · 5.1 mi94596 Walnut Creek · 5.4 mi94582 San Ramon · 5.7 mi

About ZIP 94528

ZIP code 94528 is assigned to Diablo, California. It lies in Contra Costa County. Its Census area covers about 1.15 square miles of land. The closest neighboring ZIP is 94526 (Danville), about 2.3 miles away.

Every address in 94528 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources