Find the last 4 digits (ZIP+4) for an address in 91901

ZIP 91901, Alpine, CA is filled in. Just type the street address.

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ZIP Code 91901 – Alpine, CA

Alpine, California · San Diego County · Pacific time

ZIP code91901
CityAlpine
StateCalifornia
CountySan Diego County
Population18,197
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area77.87 sq mi
Center (lat, long)32.8136, -116.7270

Area codes in this area

858

These are the area codes that most often serve ZIP 91901 (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

91903 Alpine · 2.7 mi91931 Guatay · 8.7 mi91916 Descanso · 8.7 mi92021 El Cajon · 8.7 mi91935 Jamul · 8.7 mi92019 El Cajon · 8.7 mi92040 Lakeside · 11.6 mi91917 Dulzura · 11.9 mi

About ZIP 91901

ZIP code 91901 is assigned to Alpine, California. It lies in San Diego County. Its Census area covers about 77.87 square miles of land. The closest neighboring ZIP is 91903 (Alpine), about 2.7 miles away.

Every address in 91901 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