Cities and cities within the San Francisco Bay Space at the moment utilizing space code 510 shall be served by a brand new code: 341 is the brand new NPA introduced by the California Public Utilities Fee in June. The 2 space codes will overlay or cowl the identical space. A few of the cities served by the brand new overlay complicated: Alameda, Berkeley, El Cerrito, Oakland… 1+10 digit dialing turns into the brand new calling methodology beginning June 22, 2019.
See official announcement and map of the new overlay complex 510/341 (PDF doc).
Go to area code 341 web page for a listing of cities served, map and different information.