EAST BAY (KRON) — Phone calls in parts of Alameda and Contra Costa counties are about to change. State officials are introducing a new area code to replace the current 510 area code used in much of ...

OAKLAND — The new telephone area code for a big stretch of the East Bay, including its largest city, Oakland, is 341, state regulators said Thursday. The 341 area code will be overlaid upon — ...

First there was 510, then came 925, and now, parts of the East Bay will welcome a new telephone area code: 341. The California Public Utilities Commission approved the new digits Thursday. The 341 ...