Area Codes 415 And 628
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Area Codes 415 and 628
458/541775702928442/760916530707209559831805661858909951619213323707916415650510925408209831805661442/760310/424747/818626909951949562657/714
Map of California numbering plan areas (blue) and border states. Area codes 415 and 628 are shown in red.

Area codes 415 and 628 are California telephone area codes for San Francisco and its northern suburbs in Marin County (across the Golden Gate Bridge), and the northeast corner of San Mateo County.[1]

History

415 was one of the original three area codes in California, established in 1947. It originally covered central California, south of area code 916 and north of area code 213. It stretched from Sacramento in the north to Bakersfield in the south.[2]

In 1950, 415 was extended along the North Coast to the Oregon border and shortened in the south, while 916 was rotated to cover the northeastern corner of the state.[3] As part of this realignment, Sacramento was shifted from 415 to 916, while Bakersfield moved to 213.

For a short time in the early 1950s, area code 318 was temporarily used, initially by customers in Englewood, New Jersey, participating in the first customer direct distance dialing experiment to reach San Francisco as well as some areas north of the Golden Gate.[4] In 1953, the entire Bay Area was "reunited" in using area code 415.

Area 415 has been split three times due to the Bay Area's rapid growth:

On February 21, 2015, area code 628 was assigned as an overlay for new numbers in the 415 territory, making ten-digit dialing mandatory in the area.[9] 415 had been one of the few urban area codes that had not been overlaid, making San Francisco one of the largest cities where seven-digit dialing still functioned.

Communities in the 415/628 area codes

City & County of San Francisco

Marin County

Dillon Beach and Tomales are in area code 707.

San Mateo County

See also

References

  1. ^ http://www.cpuc.ca.gov/PUC/Telco/generalInfo/Area+Codes/415+Area+Code.htm
  2. ^ Madison, Linc (1999-05-27). "LincMad's 1947 Area Code Map". Archived from the original on 4 January 2007. Retrieved . 
  3. ^ Moore, Carl (1996-02-12). "history.of.area.splits". TELECOM digest. Retrieved . 
  4. ^ Cuccia, Mark (1996-08-13). "Re: When Was Direct Distance Dialing Cut In?". TELECOM digest. Retrieved . 
  5. ^ Madison, Linc. "NANP Area Code History: 1948 - 1959". Retrieved . [permanent dead link]
  6. ^ Fabisch, M.P. (1990-06-13). "NANPA Revised Date for Split of 415 (California) Numbering Plan Area" (PDF). Bellcore Letter. Retrieved . 
  7. ^ "AT&T- News Room". Att.com. 1998-01-28. Retrieved . 
  8. ^ Deak, J.N. (1996-11-22). "NANPA Revised Date for Split of 415 (California) Numbering Plan Area" (PDF). North American Numbering Plan Letter. PL-NANP-022. Retrieved . 
  9. ^ "415, meet 628: New S.F. area code debuts Saturday"

External links

California area codes: 209, 213/323, 310/424, 408/669, 415/628, 442/760, 510, 530, 559, 562, 619, 626, 650, 657/714, 661, 707, 747/818, 805, 831, 858, 909, 916, 925, 949, 951
North: 707
West: Pacific Ocean, 808 area code 415/628 East: 510, 925
South: 650
Hawaii area codes: 808

Coordinates: 38°00?N 122°36?W / 38°N 122.6°W / 38; -122.6


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.


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