Area Codes for San Francisco, California

While San Francisco proper currently has only one area code, there are several area codes actively in use in greater San Francisco metropolitan area, including: 415, 650, 510, 408. These area codes cover San Francisco proper as well as nearby suburbs and towns, including Oakland, Fremont, San Jose, Palo Alto, San Mateo, and San Rafael, among other locations. In addition, a large number of area codes are used in other parts of California.

In San Francisco, area codes are always included in written telephone numbers and area codes must be dialed for all calls, even for local calling. All US phone numbers are 10-digits total, including a 3-digit area code and a 7-digit local subscriber number.

San Francisco area code information:

San Francisco area codes:
415, 650, 510, 408

Area codes are used to route phone calls to a specific geographic area within a country. All area codes in the United States are exactly 3-digits long.

In the past, a given region often had just one area code. Nowadays, many cities and towns in denser urban areas, including San Francisco, have 2 or more area codes.

To make an inbound international call (or domestic long distance call) to a San Francisco landline or mobile phone, you need to dial the appropriate 3-digit area code, followed by a 7-digit local subscriber number.

If you don't have a fully specified 10-digit phone number, including area code, you will not be able to complete an inbound call.

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Area Codes Used In & Near San Francisco, California

There are several area codes used in San Francisco and surrounding areas. As yet, San Francisco does not yet widely use 'overlay' area codes which have been introduced in other areas to provide additional phone number capacity.

Many other area codes are used across the rest of the state of California.

Here are the area codes in use for greater San Francisco metro area.

San Francisco Area Codes

Area Codes Main Locations
 415  San Francisco (city and county), Marin County, including San Rafael, Novato, San Anselmo, Larkspur, Corte Madera, and parts of San Mateo county, including Daly City, Brisbane
 650  most of San Mateo County, including Daly City, Menlo Park, San Bruno, Redwood City, San Carlos, San Mateo, South San Francisco, Burlingame; parts of Santa Clara County, including Mountain View, Palo Alto, Stanford, Los Altos
 408  much of Santa Clara County, including Gilroy, Morgan Hill, Saratoga, Los Gatos, Monte Sereno, Milpitas, Sunnyvale, Santa Clara, Cupertino, and San Jose
 510  most of Alemeda County, including Oakland, Alemeda, Berkeley, San Leandro, Castro Valley, Hayward, Union City, Fremont; and parts of Contra Costa County, including Richmond, Hercules, San Pablo
 925  parts of Alemeda County, including Pleasanton, Livermore, most of Contra Costa County, including Walnut Creek, Concord, Danville, San Ramon, Antioch, Brentwood
 707  Napa County, Sonoma County, including Santa Rosa, Solano County, including Vallejo, and other counties to the north

See maps and other area code listings below for further information.

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Area Codes for Towns in San Francisco Area

Here are the area codes for the 20 or so largest cities and towns in and around San Francisco, California (in alpha order).

Town Area Code(s)
Antioch area code  925 
Berkeley area code  510 
Concord area code  925 
Daly City area code  650 
Fairfield area code  707 
Fremont area code  510 
Hayward area code  510 
Livermore area code  925 
Napa area code  707 
Oakland area code  510 
Redwood City area code  650 
Richmond area code  510 
San Francisco area code  415 
San Jose area code  408 
San Leandro area code  510 
San Mateo area code  650 
Santa Clara area code  408 
Santa Rosa area code  707 
Sunnyvale area code  858 
Vacaville area code  707 
Vallejo area code  707 

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Lookup San Francisco Area Codes

To find the area codes (or ZIP codes) used in the San Francisco Bay Area, please use the search widgets. The first widget looks up area codes and ZIP codes by town. The second widget does reverse lookup by area code or ZIP code.

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San Francisco, California Area Code Maps

The following maps show area codes for San Francisco and the state of California.

San Francisco Area Code Map

San Francisco area code map

Source: Area Code Maps

California Area Code Map

California area code map

Source: Area Code Maps

Maps may not be completely up to date. Check other map links below if this appears out of date.

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City Codes vs. Area Codes

In some cases, area codes may be referred to as city codes. However, a 'city code' more correctly refers to the codes used to designate airports and other geographic locations. These codes are issued under the United Nation's UN/LOCODE system and/or the IATA airport coding system. The city code for San Francisco is SFO.

Other Area Code Information

San Francisco online telephone directories
San Francisco dialing steps

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