ZIP Code 91903 – Alpine, CA
Alpine, California · San Diego County · Pacific time
| ZIP code | 91903 |
|---|---|
| City | Alpine |
| State | California |
| County | San Diego County |
| Population | Not published (no Census ZIP area) |
| Time zone | Pacific · local time |
| ZIP type | PO box or unique ZIP (no Census area) |
| Center (lat, long) | 32.8351, -116.7664 |
Area codes in this area
These are the area codes that most often serve ZIP 91903 (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
About ZIP 91903
ZIP code 91903 is assigned to Alpine, California. It lies in San Diego 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 91901 (Alpine), about 2.7 miles away.
Every address in 91903 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