Area code overlay is the introduction of a new area code to a region. In this case, 457 is being added to the 318 area code ...

To ensure a continuing supply of telephone numbers, the California Public Utilities Commission has approved an all-services overlay for the 530 area code on Jan. 31.

Early last year, the PUC adopted the area code overlay, the state’s first. Starting last December, 11-digit dialing was permissible within the 310 area code; as of July 26, it will be mandatory.

Southern California residents and businesses in the 909 area code need to get ready for the overlay of an 840 area code and a change in dialing procedure, state regulators said Thursday. The overla… ...

COLUMBUS, Ohio — A new phone area code “overlay” has been approved for the 440 zone, with officials saying the current code soon will run out of available numbers.

Photo by honeybeejen via the LAist Featured Photos pool on Flickr Back in April of 2008 we remarked that the announcement of a new overlay area code--a code within an existing code area for use ...

Anthony said both the overlay and a plan for a split — dividing the 918 area into two area codes — had advantages and disadvantages, but the overlay treats all current customers equally.

Under the state's first new area code overlay, virtually all new phone numbers within the 310 territory will be assigned the new 424 area code, starting in August 2006; existing numbers will ...

The state Public Utilities Commission will hold public hearings today and Wednesday to gauge reaction to a proposal for a new "overlay" telephone code in the Westside and South Bay areas now ...

The overlay will require customers to dial 1 plus the three-digit area code for all calls from telephone numbers with 909 and 840 area codes, including local calls, the California Public Utilities ...