Area Code Atlas

NANP- Overlay of 408 Numbering Plan Area (NPA) with 669 NPA - California

Overlay planned for NPA 408 with new NPA 669

An overlay complex was approved by the California Public Utilities Commission in late 1998 and formalized in January 1999 to introduce area code 669 as an overlay for the 408 numbering plan area to provide relief due to continued growth in telecommunications services.

Overlay relief for NPA 408 suspended

The overlay relief plan for area code 408, including the introduction of 669, was suspended by the California Public Utilities Commission in January 2000 due to the implementation of telephone number pooling, which delayed the need for new area codes.

Overlay of 669 approved for 408

On October 20, 2011, the California Public Utilities Commission approved the implementation of area code 669 as an all-services overlay for the existing 408 area code. This decision was made to address the projected exhaustion of available numbers in the 408 region.

NPA 669 overlay approved for 408

The California Public Utilities Commission approved the implementation of area code 669 as an all-services overlay for the 408 numbering plan area on October 20, 2011. This decision was made to address number exhaustion in the region.

NPA 669 overlay on 408 announced

NPA 669 to Overlay NPA 408 (California)

Permissive 1+10-digit dialing for 408/669 overlay

A six-month permissive dialing period for the 408/669 overlay began on April 21, 2012. During this period, callers could use either seven-digit or 1+10-digit dialing for local calls within the affected area.

Mandatory 1+10-digit dialing for 408/669 overlay

On October 20, 2012, mandatory 1+10-digit dialing was implemented in the 408 and 669 area codes. After this date, all local calls required dialing the area code plus the seven-digit number.

Activation of 669 overlay for 408

On November 20, 2012, area code 669 was officially activated as an overlay for the 408 area code region. New telephone numbers could be assigned with the 669 area code, serving the same geographic area as 408.

NPA 669 activated as overlay for 408

Area code 669 was officially activated as an overlay for the 408 numbering plan area on November 20, 2012. New telephone numbers could be assigned with the 669 area code from this date.