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On August 2, 1997, area code 650 was created; the partition approximately followed the boundary between San Francisco, which (along with Marin County) kept 415, and San Mateo County to the south, which received the new code.
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]
Most of the San Gabriel Valley including Pasadena, El Monte, West Covina. Split from 818 on June 14, 1997 628: San Francisco, San Rafael, Novato; all of San Francisco County, most of Marin County and a small portion of northern San Mateo County: Overlay with 415, started service on March 21, 2015 [3] 650
The additional demands for PCS and cellular phone numbers helped necessitate the 831/408 area code split, the 650/415 split, and the earlier 510/415 split. Part of the previous dialing plan included a mass calling prefix for radio station contests, introduced in the 1960s because some contests put unacceptable loads on the Bay Area's telephone ...
The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.
A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the number may have ...
KGO-TV first signed on the air on May 5, 1949, as the San Francisco Bay Area's second-oldest television station, signing on five months after KPIX (channel 5) and the 50th in the United States. In fact, KPIX had a hand in getting KGO-TV on the air, as the CBS -affiliated station produced informational programming on how to receive and view ABC ...
The area codes serve part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area codes include Napa , Sebastopol , Vallejo , Benicia , Fairfield , Santa Rosa , Windsor , Healdsburg , Rohnert Park , Petaluma , Fort Bragg , Rio Vista , Crescent City , Eureka , Clearlake , Vacaville , Dixon , and Ukiah . 707 ...