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From Wikipedia, the free encyclopedia

458/541775702928442/760916/279530707209559831805661858909951619213323707916/279415650510/341925408209831805661442/760310/424747/818626909951949562657/714
Map of California numbering plan areas (blue) and border states. Area code 707 is shown in red.

Area code 707 is a telephone area code in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. It was created by a split of area code 415 on March 1, 1959. It serves part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area code include Napa, Sebastopol, Vallejo, Benicia, Fairfield, Santa Rosa, Windsor, Healdsburg, Rohnert Park, Petaluma, Fort Bragg, Crescent City, Eureka, Clearlake, Vacaville, Ukiah, and northwestern California.

History

When the North American Numbering Plan was created by AT&T in 1947, the far northern part of California received area code 916, with the exclusion of the city of Sacramento, which used area code 415. California area codes were reorganized geographically in 1950, so that 916 was assigned to a numbering plan area that comprised only the northeastern part from the Sierra Nevada to the Central Valley. The coastal area to the west was assigned area code 415. With this change, Sacramento was also changed to area code 916.

On March 1, 1959, numbering plan area 415 was divided in a flash-cut (without permissive dialing period) in which the northern part of the numbering plan area (Solano county and north thereof) received area code 707, which was California's eighth area code (along with 213, 415, 916, 714, 408, 805, and 209), and the last new area code in the state until 619 was added in 1982.

It is not only the only one of these area codes never to have required relief, but it is also the only one of California's thirteen original-format area codes (i.e., area codes with a 0 or 1 as their middle digit, the others being 310, 510, 818 and 909, all of which, in addition to 619, were introduced decades after 707's debut) not to require relief from a "new format" area code (those with 2–8 as their middle digit, which were introduced beginning in 1995 when the NANP ran out of the original format NPAs), despite explosive growth in the area, particularly its southern portion, as well as the proliferation of cell phones and pagers.

When area code 530 was split from area code 916 on November 1, 1997, the Dixon area was renumbered from area code 916 to 707 and switched from the Sacramento local access and transport area (LATA) into the San Francisco LATA.

In 1999, a three-way, two-phase split of the area code 707 was scheduled by Pacific Bell,[1] such that a new area code (627) would have served most of Napa and Sonoma Counties and small portions of Marin and Mendocino Counties, while another new area code (369) would have served Solano County, as well as a small portion of Napa County, beginning in December 2000 and October 2001, respectively. However, due to the success of number pooling in preserving numbering resource, the California Public Utilities Commission cancelled these actions on July 27, 2000.

From projections in 2018 and the first quarter of 2020, area code 707 is expected to need area code relief not earlier than mid-2025.[2]

Service area

Del Norte County

Humboldt County

Lake County

Marin County

Mendocino County

Napa County

Solano County

Sonoma County

Trinity County

See also

References

  1. ^ "707 - 627 - 360 Area Code Split" (PDF). AT&T. Retrieved 2020-07-17.
  2. ^ https://nationalnanpa.com/reports/2018-2_NPA_Exhaust_Projections_Final.pdf

External links

California area codes: 209, 213/323, 279/916, 310/424, 341/510, 408/669, 415/628, 442/760, 530, 559, 562, 619/858, 626, 650, 657/714, 661, 707, 747/818, 805/820, 831, 840/909, 925, 949, 951
North: 541
West: Pacific Ocean area code 707 East: 530, 916
South: 415, 510/341, 925
Oregon area codes: 458/541, 503/971

This page was last edited on 17 July 2020, at 14:49
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