Oakland, California

Where Is Area Code 341?

Area code 341 is in northern California. It serves Oakland and much of Alameda County on the east side of San Francisco Bay. It is part of the San Francisco Bay Area.

Area code 341 covers communities that share the 510 numbering plan area. Major cities include Oakland, Berkeley, Fremont, Hayward, Alameda, San Leandro, and Union City. The area also includes other Alameda County communities and a small part of western Contra Costa County, including El Cerrito and Richmond.

This area sits along the eastern shore of San Francisco Bay. Notable places in the 341 service area include the Port of Oakland, the University of California, Berkeley, and Oakland International Airport. The region is also connected by major bay crossings such as the San Francisco-Oakland Bay Bridge.

History of Area Code 341

Area code 341 was introduced on July 22, 2019. The California Public Utilities Commission approved it as an overlay for area code 510 to add more phone numbers in the East Bay. An overlay means new numbers can use 341 while existing numbers keep 510.

Area code 510 itself was created in 1991 in a split from area code 415. Before 341 began service, the 510 region had already added area code 341 as its relief plan because of continued demand for new phone numbers, mobile phones, and other devices. Since 2019, callers in the 510 and 341 area must use 10-digit dialing for local calls.

Key Facts About Area Code 341

• Area code 341 is a California area code that serves Oakland and the East Bay.
• Area code 341 is an overlay for area code 510, and both area codes serve the same geographic region.
• Area code 341 officially entered service on July 22, 2019.
• Area code 341 serves cities including Oakland, Berkeley, Fremont, Hayward, Alameda, and San Leandro.
• Area code 341 primarily covers Alameda County and also reaches a small part of western Contra Costa County.
• Area code 341 is in the Pacific Time Zone.
• The 341 and 510 service area includes major institutions such as the University of California, Berkeley.
• The 341 service area includes major transportation and business sites such as the Port of Oakland and Oakland International Airport.

Frequently Asked Questions

What state is area code 341 in?

Area code 341 is in California.

What major cities use area code 341?

Major cities that use area code 341 include Oakland, Berkeley, Fremont, Hayward, Alameda, San Leandro, Union City, Richmond, and El Cerrito.

Is area code 341 a toll-free number?

No. Area code 341 is a geographic area code for the East Bay in California.