Upcoming Area Codes
California
760/442 Area Code Overlay – California
Affected Areas – Imperial, Inyo and Mono Counties – Most of San Bernardino County, Northern San Diego County, and Eastern Kern and Riverside Counties
Effective Date – November 21, 2009
Kentucky
270/364 Area Code Split – Western Kentucky
Affected Area – Western Kentucky splitting the 270 area code in to two area codes – 270 and 364
Effective Date – TBA
Oregon
541/458 Area Code Overlay – Most of Oregon
Affected Area – Southern and Eastern portions of Oregon
Effective Date – February 10, 2010
Wisconsin
715/534 Area Code Overlay – Northern Wisconsin
Affected Area – Communities such as Ashland, Eau Claire, Hayward, Hurley, Marinette, Medford, Niagra, Rhinelander, River Falls, Stevens Point, Superior and Wausau
Effective Date – August 14, 2010
920/274 Area Code Overlay – North East Wisconsin
Affected Area – Communities such as Appleton, Beaver Dam, Berlin, Fond du Lac, Fort Atkinson, Green Bay, Manitowoc, Oshkosh, Ripon, Sheboygan, Sturgeon Bay and Watertown
Effective Date – March 10, 2012
