Area Code 858
California
Area code 858 serves California, primarily San Diego, in the Pacific Time (PT) time zone. It is an overlay area code sharing territory with area code 619.
Published: Verified against NANPA and FCC records
Overlay Area Code
This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.
The codes serving this same region: area code 619 (San Diego).
In service since: 12-Jun-1999
Demographics & Economics
- Total Population
- 2,371,073
- Population Density
- 781 people/sq miabove U.S. average (U.S.: 95 people/sq mi)
- Median Household Income
- $106,268above U.S. median (U.S.: $80,734)
- Poverty Rate
- 10.3%below U.S. average (U.S.: 12.5%)
- Unemployment Rate
- 6.1%above U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+43.2%above U.S. average (U.S.: 35.7%)High School or Lower23.8%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the income ranking and density ranking.
Time Zone
- Pacific Time (PT)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
CA
Major Cities
- San Diego
- Chula Vista
- El Cajon
- Encinitas
- La Mesa
- Santee
- Poway
- La Presa
- Lemon Grove
- Imperial Beach
- Rancho San Diego
- Winter Gardens
- Casa de Oro-Mount Helix
- Coronado
- Bostonia
- Alpine
- Bonita
- Solana Beach
- Jamul
- Eucalyptus Hills
- Harbison Canyon
- Del Mar
- Granite Hills
- Crest
and 12 more cities
History
Area code 858 serves as an overlay for the same territory as area code 619. It was introduced in 1999 to provide additional phone number capacity for the region. It shares its territory with area code area code 619.
Demographics
The estimated population served by area code 858 is approximately 2,371,073. The population density is 781 people per square mile, which is higher than the national average of 95. The median household income is $106,268, which is higher than the national median of $80,734. Approximately 43.2% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is higher than the national average. The poverty rate stands at 10.3%, which is lower than the national rate of 12.5%.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 858).
| County | Population | Share |
|---|---|---|
| San Diego, CA | 2,371,073 | 100.0% |
Area Code 858 Family Tree
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Area code 858 was originally assigned in 12-Jun-1999 to serve CA.
Call Context
This area code covers a geographic region across CA, including San Diego and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 858.
Other Area Codes in California
Area codes that also serve California, linked for easy comparison.