Area Code Atlas

707 NPA Splits, Creating 369 and 627 NPAs (California)

Cancellation of planned split of 707 to create 369 and 627

A three-way, two-phase split of area code 707 was scheduled to create new area codes 369 and 627, but the California Public Utilities Commission cancelled the plan on July 27, 2000, due to the success of number pooling in preserving numbering resources.

California PUC approved 707/369 overlay

On June 23, 2022, the California Public Utilities Commission approved an all-services distributed overlay for the 707 area code. The new 369 area code was designated to serve the same geographic area as 707 to provide additional numbering resources.

NPA 369 overlay on 707 announced

NPA 369 to Overlay NPA 707 (California)

Overlay of area code 707 by new area code 369 announced

The NANP Administrator set the effective implementation date for the overlay of area code 707 by the new area code 369 to February 1, 2023, to provide relief for numbering resource exhaustion in the region.

NPA 369 overlays 707 on February 1, 2023

On February 1, 2023, area code 369 was activated as an overlay for the 707 numbering plan area. This overlay covers the same geographic region in northwestern California, allowing for additional numbering resources.