Where Is Area Code 341?
Area code 341 serves California’s East Bay, with Oakland as its primary city. The region lies along the eastern shore of San Francisco Bay in the Pacific Census region and uses Pacific Time. Area code 341 is a geographic overlay, so it shares its service territory with area code 510.
The service area includes parts of Alameda and Contra Costa counties. Major communities include Oakland, Berkeley, Fremont, Hayward, Richmond, San Leandro, Alameda, and Union City. Notable features and institutions include the San Francisco Bay shoreline, the East Bay hills, the Port of Oakland, the University of California, Berkeley, and Oakland International Airport.
Cities and Communities in the 341 Area Code
- Alameda, Alameda County
- Albany, Alameda County
- Berkeley, Alameda County
- Castro Valley, Alameda County
- El Cerrito, Contra Costa County
- Emeryville, Alameda County
- Fremont, Alameda County
- Hayward, Alameda County
- Hercules, Contra Costa County
- Kensington, Contra Costa County
- Newark, Alameda County
- Oakland, Alameda County
- Piedmont, Alameda County
- Pinole, Contra Costa County
- Richmond, Contra Costa County
- San Leandro, Alameda County
- San Lorenzo, Alameda County
- San Pablo, Contra Costa County
- Union City, Alameda County
History of Area Code 341
Area code 341 was established in 2019 as an overlay of area code 510. It was not created by splitting the 510 territory. The overlay allowed new telephone numbers to receive the 341 code while existing customers could keep their 510 numbers.
Area code 510 was created in 1991 through a split from area code 415. Area code 925 later split from 510 in 1998 to serve communities farther east. The 341 overlay added numbering capacity as the East Bay’s demand for residential, business, mobile, and other telephone lines increased.
Key Facts About Area Code 341
- State and primary city: Area code 341 is in California, and Oakland is its primary city.
- Region: Area code 341 serves the East Bay in the Pacific region of the United States.
- Type: Area code 341 is a geographic area code and an overlay code.
- Overlay partner: Area code 341 shares its geographic service area with area code 510.
- Counties: The 341 service area includes parts of Alameda County and Contra Costa County.
- History: Area code 510 was created from area code 415 in 1991, and area code 925 split from 510 in 1998.
- Landmarks: The area includes the Port of Oakland, Oakland International Airport, and the University of California, Berkeley.
- Population: Area code 341 has no separate official Census population total because telephone area codes do not match Census-defined boundaries.
Frequently Asked Questions
What state is area code 341 in?
Area code 341 is in California.
What major cities use area code 341?
Oakland, Berkeley, Fremont, Hayward, Richmond, San Leandro, Alameda, and Union City use numbers within the 341 overlay.
What time zone is area code 341 in?
Area code 341 uses Pacific Time.
Is area code 341 a toll-free number?
No, area code 341 is a geographic area code, not a toll-free code.