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Area code for San Diego
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Key neighborhoods and districts
Prefix: 619
Business district, Gaslamp Quarter, and harbor
Prefix: 858
Biotech hub and UCSD campus
Prefix: 858
Tech companies and life sciences
Prefix: 858
Corporate offices and tech companies
Prefix: 619
Naval base and resort community
San Diego is the eighth-largest city in the United States and a major hub for military, biotech, tourism, and technology. With a perfect climate and proximity to the Mexican border, San Diego attracts businesses in defense, life sciences, and telecommunications. The city uses area codes 619 (central/south) and 858 (north), with 760 covering North County.
Financial services, hospitality, and conventions
Format: +1 619 XXX XXXX
Biotech, pharma, and research institutions
Format: +1 858 XXX XXXX
Tech companies, telecom, and life sciences
Format: +1 858 XXX XXXX
Defense contractors and aerospace companies
Format: +1 858 XXX XXXX
San Diego is in the Pacific Time Zone. Business hours are 9 AM - 5 PM, but the casual culture means flexibility is common. Biotech and defense industries maintain stricter schedules. Fridays are very casual. The city is close to Tijuana, Mexico, so cross-border business is significant.
Step-by-step dialing instructions
Dial the full 10-digit number. 619 covers central and south San Diego, 858 covers the north including La Jolla.
619 is central/south San Diego, 858 covers northern areas including La Jolla and Rancho Bernardo, 760 covers North County.
Excellent coverage from all carriers. Qualcomm (wireless technology company) is headquartered here.
San Diego has a relaxed, casual business culture influenced by the beach lifestyle. However, military and biotech sectors maintain professional standards. Work-life balance is emphasized.
Example: +1 619 1234567
Common reasons people call this city
Connect with Navy bases, Marines, and defense contractors
Reach pharmaceutical and biotech companies in Torrey Pines
Contact tech companies including Qualcomm headquarters
Connect with hotels, attractions, and convention services
Key statistics and information
Population
Time Zone
Business Hours
Peak Times
Get answers to common questions
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