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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, respectively. [ 1 ] In 1950, the boundaries of the numbering plan area were redrawn to produce a division of the northern and central parts along a north–south ...
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: ...
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.
This map is clickable; click on any region shown to visit the page for those area codes.Area code 530 is shown in red. Area codes 530 and 837 are telephone area codes in the North American Numbering Plan (NANP) in northeastern and Northern California . 530 was created in 1997 in an area code split of 916 and 837 was added to the same numbering ...
Area codes 909 and 840 are telephone area codes in the North American Numbering Plan for the far-eastern part of Los Angeles County, southwestern San Bernardino County, and a small portion of Riverside County in the U.S. state of California. Area code 909 was created on November 14, 1992, in an area code split of 909, and 840 was added to the ...
It includes Imperial, Inyo, and Mono counties, as well as portions of North County San Diego, Riverside, San Bernardino, Los Angeles and Kern counties. Area code 760 was created on March 22, 1997 in a split of area code 619. [1] Area code 442 was added to the same area on November 21, 2009.
This map is clickable; click on any region shown to visit the page for those area codes.Area code 916 is shown in red. Area codes 916 and 279 are California telephone area codes that serve Sacramento, the state capital, and most of its suburbs. Area code 916 was one of the first three original area codes established in California in October 1947.
According to the U.S. Census Bureau, the county has a total area of 20,105 square miles (52,070 km 2), of which 20,057 square miles (51,950 km 2) is land and 48 square miles (120 km 2) (0.2%) is water. [15] It is the largest county by area in California and the largest in the United States (excluding boroughs in Alaska). [16]