858 area code
Get a local phone number in San Diego, CA
Biggest city:
San Diego
State:
California
Major Cities:
San Diego, Del Mar, Rancho Santa Fe
Timezone:
Pacific (GMT -8)
Population:
1,419,516
Average Income:
$121,230
Zip codes:
92101
92199
Unemployment Rate:
4.20%
Nearby area codes:
619
760
858 area code summary
Area code 858 serves northern San Diego County in southern California, including communities such as La Jolla, Mira Mesa, Poway, and Del Mar. Split from area code 619 in 1999, 858 encompasses affluent residential areas, biotech corridors, and parts of the University of California, San Diego (UCSD) campus. The region is a hub for innovation, with companies in telecommunications, defense, software, and life sciences clustered along the I-5 and I-805 corridors. La Jolla, in particular, is home to high-end real estate, research institutions, and cultural institutions. Residents in 858 enjoy coastal proximity, highly ranked schools, and a mild climate year-round. The area code represents a prestigious slice of San Diego County, often associated with both academic excellence and high-tech development. Whether you’re launching a startup, expanding healthcare services, or simply building local credibility, a number in 858 reflects quality and trust in one of California’s most desirable regions.
Fun fact 💡
La Jolla’s Scripps Institution, since 1903, is a 858 science pioneer.
🏢First Phone Company:
Pacific Bell (later AT&T)
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