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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 state ...
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.
If this map is the primary area code map of California (master map), no area code appears in red. Map is correct as of 2023-07-02. To make changes, updates, and replacing the lesser maps (the ones for a specific area code block), this file uses CSS to define the colors for each region.
Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in Marin County (across the Golden Gate), and the northeast corner of San Mateo County in the U.S. state of California. Area code 415 was one of the eighty-six original North American area codes ...
Northern Orange County, California: 658: 876: Jamaica: 659: 205: Western and central Alabama: 669: 408: Southern Bay Area in California, encompassing much of Santa Clara County and Silicon Valley [5] 672: 604, 250: British Columbia: 680: 315: An area of Upstate New York including parts of Central New York and the North Country, with Syracuse as ...
Orange County Area. Santa Ana-Anaheim-Irvine, CA. Santa Ana; South Coast Metro; Santa Ana Valley; Saddleback Valley; Santa Ana Mountains; San Diego–Tijuana. San Diego metropolitan area. North County. North County Coastal; North County Inland; Temecula Valley; East County. Mountain Empire; South Bay
The Bay Area consists of nine counties (Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma) and 101 municipalities. [5] One, San Francisco, is a consolidated city–county. California law makes no distinction between "city" and "town", and municipalities may use either term in their official names. [6]
County FIPS code [8] County seat [9] Est. [9] Formed from Etymology [10] General Law or Charter [6] Population (2023) [11] Area [9] Map Alameda County: 001: Oakland: 1853: Contra Costa and Santa Clara: The oak and other trees, once abundant in the region; alameda is Spanish for "avenue shaded by trees" or "cottonwood grove". Charter 1,622,188: ...