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In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes : 213 , 415 , and 916 , for the southern, central, and northern parts of the ...
Area codes 510 and 341 are telephone area codes in the North American Numbering Plan (NANP) serving much of the East Bay in the U.S. state of California. They cover parts of Contra Costa County and western Alameda County, including the city of Oakland, but excluding Dublin, Livermore, Pleasanton, and Sunol. Area code 510 was established on ...
The Oakland Hills neighborhoods comprise the highest elevations within the city's land area, following the alignment of the hills and the central section of the Hayward Fault Zone. The area includes all of Oakland lying east of State Route 13 and east of I-580 south of its junction with Route 13.
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
Montclair is located along the western slope of the Oakland Hills from a valley formed by the Hayward Fault to the upper ridge of the hills. Although there is no formal definition of the neighborhood, the general boundaries are Highway 24 to the north, Joaquin Miller Road to the south, the city of Piedmont to the west and the Contra Costa ...
Area codes 310 and 424 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. The numbering plan area includes the West Los Angeles and South Bay areas of Los Angeles County , a small portion of Ventura County , and Santa Catalina Island , which is located 26 miles (42 km) south.
Aerial view of Downtown Satellite picture of the Oakland area in 2019. Oakland is in the eastern region of the San Francisco Bay. The United States Census Bureau says the city's total area is 78.0 square miles (202 km 2), including 55.8 square miles (145 km 2) of land and 22.2 square miles (57 km 2) (28.48 percent) of water.
Green Valley is a census-designated place (CDP) located in Solano County, California, United States.It sits in the northeast corner of the San Francisco Bay Area and is located approximately 45 miles (72 km) from Sacramento, approximately 38 miles (61 km) from San Francisco, approximately 32 miles (51 km) from Oakland, less than 15 miles (24 km) from Napa Valley, and less than 15 miles (24 km ...