Area codes in San Diego, California
San Diego, California uses 2 area codes — 619 and 858. The main San Diego area code is 619.
Area codes serving San Diego
Phone numbers in San Diego are written as ten digits — for example (619) 555-0190 — and fall in the Pacific Time zone.
How San Diego came to have 2 area codes
The original San Diego area code is 619, in service since 1982. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 858 (1999). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why San Diego now uses all 2 codes and every local call is dialed with ten digits.
All California area codes · Is a San Diego call a scam?
Nearby cities
- Chula Vista area codes
- Encinitas area codes
- Escondido area codes
- San Marcos area codes
- Vista area codes
- Carlsbad area codes
- Oceanside area codes
- Temecula area codes
More cities in California
- Los Angeles area codes
- San Francisco area codes
- Sacramento area codes
- San Jose area codes
- Fresno area codes
- Long Beach area codes
- Oakland area codes
- Bakersfield area codes
Frequently asked questions
What is the area code for San Diego?
The main area code for San Diego, California is 619. San Diego is now served by 2 area codes in total: 619, 858.
How many area codes does San Diego have?
San Diego has 2 area codes: 619, 858.
Why does San Diego have more than one area code?
As San Diego used up the numbers available in its original area code (619, in service since 1982), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a San Diego number?
Dial all 10 digits — the area code (619 or 858) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.