Area Code 341 Location

Area code 341 serves Oakland, California, and the wider East Bay as an overlay to area code 510. This region sits on the east side of the San Francisco Bay and includes key parts of Alameda and western Contra Costa counties, a hub for trade, education, and culture. You’ll find major transit like BART, the busy Port of Oakland, and neighborhoods that connect the Bay Area’s urban core. The area uses the Pacific Time Zone and follows the North American Numbering Plan.

Major cities in the 341/510 overlay include:

• Oakland
• Berkeley
• Alameda
• San Leandro
• Hayward
• Fremont
• Richmond

Landmarks across the overlay include Lake Merritt, Jack London Square, the Oakland Coliseum, Oakland International Airport (OAK), and the University of California, Berkeley. These sites highlight the area’s mix of history, higher education, and global commerce. The overlay ensures residents and businesses can get new local phone numbers without changing the region’s boundaries. Both 341 and 510 cover the same communities, streets, and addresses.

The 341 area code was activated in July 2019 to add more numbers for the fast-growing East Bay. Local calls require 10‑digit dialing, and existing 510 numbers did not change; new lines may be assigned 341. As the California Public Utilities Commission explains, “the 341 area code overlays the existing 510 area code to ensure a continuing supply of telephone numbers” (CPUC, 2019). In short, if you see a 341 phone number, it’s a standard East Bay number covering the same places long served by 510.