Find the last 4 digits (ZIP+4) for an address in 94023

ZIP 94023, Los Altos, CA is filled in. Just type the street address.

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ZIP Code 94023 – Los Altos, CA

Los Altos, California · Santa Clara County · Pacific time

ZIP code94023
CityLos Altos
StateCalifornia
CountySanta Clara County
PopulationNot published (no Census ZIP area)
Time zonePacific · local time
ZIP typePO box or unique ZIP (no Census area)
Center (lat, long)37.3852, -122.1141

Area codes in this area

650

These are the area codes that most often serve ZIP 94023 (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

94040 Mountain View · 1.6 mi94035 Mountain View · 1.7 mi94039 Mountain View · 1.7 mi94042 Mountain View · 1.7 mi94041 Mountain View · 2.1 mi94306 Palo Alto · 2.3 mi94024 Los Altos · 2.5 mi94022 Los Altos · 2.7 mi

About ZIP 94023

ZIP code 94023 is assigned to Los Altos, California. It lies in Santa Clara County. It is a PO-box-only or single-address ZIP, so the Census Bureau does not publish an area for it; the location shown is approximate. The closest neighboring ZIP is 94040 (Mountain View), about 1.6 miles away.

Every address in 94023 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