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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 [4] 650
Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). 7 Claro 8: Instituto Costarricense de Electricidad (Kölbi) Croatia +385: 91: 9: A1 Hrvatska: Due to Mobile number portability the prefix of an existing number does not determine the carrier. Any new number will follow the ...
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.
The Priscilla Chan and Mark Zuckerberg San Francisco General Hospital and Trauma Center [1] (ZSFG) is a public hospital in San Francisco, California, under the purview of the city's Department of Public Health. It serves as the only Level I trauma center for the 1.5 million residents of San Francisco and northern San Mateo County. [2]
Since this change went into full effect on July 8, 2017, telephone companies have been able to assign any available 213 numbers in the former 323 area and vice versa, and customers have been required to dial the area code for all calls. [5] [6] This change returned 213 to some areas that had used it for more than half a century prior to 1998. [3]
Sutter Health CPMC has origins in several early San Francisco medical institutions, including: [9] [10] The German Hospital [11] [12] - founded in 1858, was renamed Franklin Hospital during World War I and Davies Medical Center in 1968 before joining CPMC in 1998 [13]
Area code 650 is a telephone area code in the North American Numbering Plan (NANP) for the San Francisco Bay Area in the U.S. state of California. It was split from area code 415 on August 2, 1997, and includes most of San Mateo County (except the northernmost portion), part of San Francisco , and the northwestern portion of Santa Clara County ...