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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] As of July 2023, California has 38 active area codes. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra ...
Coordinates: 32.6°N 117°W. Numbering plan areas in California (blue) and border states. Area code 619 is shown in red. Area codes 619 and 858 are telephone area codes in the North American Numbering Plan (NANP) for most of San Diego County in the U.S. state of California. Area code 619 was created by a split of area code 714 in 1982.
this was the first part of North America to have its code changed three times: from 213 to 714 1951: to 619 in 1982, and to 760 in 1997. was to have originally split off the portion of 760 serving San Diego County to a new 442 area code in late 2008/early 2009; that plan was cancelled. 2009: overlaid by 442. 761.
In 2000, the Hospital Association of Southern California (HASC) [15] [16] [17] determined that a uniform code system was needed after three people were killed in a shooting incident at a hospital after the wrong emergency code was called. While codes for fire (red) and medical emergency (blue) were similar in 90% of California hospitals queried ...
Coordinates: 39.8°N 123.6°W. Numbering plan areas in California (blue) and border states. Area code 707 is shown in red. Area codes 707 and 369 are telephone area codes in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. The area codes serve part of the northern San Francisco Bay Area, as ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
This rounded the total number of digits in a subscriber telephone number to ten: a three-digit area code, three-digit central office code, and four digits for each line. This fixed format defined the North American Numbering Plan as a closed numbering plan , [ 25 ] as opposed to developments in other countries where the number of digits was not ...
Mobile telephone numbers. [ 1][ 2] In Vietnam, mobile phone numbers follow the format 09x-xxxxxxx or new prefixes: 03x, 05x, 07x, 08x. The first 0 is the trunk code. The next 2 digits ( 3x, 5x, 7x, 8x or 9y) specify the mobile phone operator. Some mobile phone operators have been given more than one operator code. In Circular No. 22/2014/TT ...