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Area code 209 was created in an area code split of area code 415 on October 26, 1957. On November 14, 1998, the southern half of this numbering plan area received the assignment of area code 559. On October 24, 2021, 209 was transitioned to 1+10-digit dialing despite not being part of an overlay complex at that time.
209 is the smallest number with six representations as a sum of three positive squares. [7] These representations are: 209 = 12 + 82 + 122 = 22 + 32 + 142 = 22 + 62 + 132 = 32 + 102 + 102 = 42 + 72 + 122 = 82 + 82 + 92. By Legendre's three-square theorem, all numbers congruent to 1, 2, 3, 5, or 6 mod 8 have representations as sums of three ...
As of July 2023, California has 38 active area codes. Area code. Service area. Notes. 209. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. Split from 415 on October 26, 1957; split off 559 on November 14, 1998; overlaid with 350 on November 28, 2022. 213.
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.
Coordinates: 38.6°N 121.5°W. Numbering plan areas in California (blue) and border states. Area code 916 is shown in red. Area codes 916 and 279 are California telephone area codes that serve Sacramento, the state capital, and most of its suburbs. Area code 916 was one of the first three original area codes established in California in October ...
In 1997, the California-Nevada Code Administration (CNCA) determined that telephone number demand in the area exceeded normal forecasts, and placed area codes 209, 213, 310, 408, 619, 805, and 818 in jeopardy status of exhausting central office codes before normal relief could be implemented, triggering special conservation measures.
Numbering plan areas and area codes since May 2001 September 1997 – May 2001 July 1988 – September 1997 October 1947 – July 1988. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [1] organized as four overlay complexes and a single-area code NPA.
NPA Year Current region 212: 1947 New York City: Manhattan only; overlays with 332, 646, and 917 : 315: 1947 Syracuse, Utica, Watertown, and north central New York; overlaid by 680.