Area code 661 is a telephone area code in the North American Numbering Plan (NANP) in the U.S. state of California. The numbering plan area comprises the southern part of the San Joaquin Valley and the far northern part of the Los Angeles metropolitan area. The largest cities in the area are Bakersfield, Santa Clarita, Palmdale, and Lancaster.
The area code was created in an area code split of numbering plan area 805 on February 13, 1999, in which the eastern part of 805 was renumbered with the new area code.
Service area The numbering plan area includes most of Kern County, most of northern Los Angeles County (specifically the Santa Clarita Valley, the Antelope Valley and the surrounding mountains), and small parts of Ventura County, Santa Barbara County, and Tulare County. Principal cities in the numbering plan area are Bakersfield, Lancaster, Palmdale, and Santa Clarita. Kern County
Arvin Bakersfield Bear Valley Springs Buttonwillow Caliente Delano Edwards Air Force Base Famoso Fellows Frazier Park Golden Hills Grapevine Havilah Keene Lake of the Woods Lamont Lebec Lost Hills Maricopa McFarland McKittrick Mettler Mojave North Edwards Oildale Pine Mountain Club Rosamond Rosedale Shafter South Taft Stallion Springs Taft Taft Heights Tehachapi Tupman Valley Acres Walker Basin Wasco Weedpatch Wheeler Ridge
Los Angeles County
Acton Agua Dulce Antelope Acres Castaic Del Sur Desert View Highlands Gorman Green Valley Juniper Hills Lake Hughes Lake Los Angeles Lancaster Leona Valley Littlerock Llano Neenach Palmdale Pearblossom Quartz Hill Santa Clarita Stevenson Ranch Valencia Val Verde Valyermo
Santa Barbara County
Cuyama New Cuyama
Tulare County
Allensworth Earlimart Posey
See also List of California area codes List of North American Numbering Plan area codes
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