https://en.wikipedia.org/wiki/Area_codes_209_and_350
Area codes 209 and 350 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California.Their service area includes Stockton, Modesto, Turlock, Merced, Winton, Atwater, Livingston, Manteca, Ripon, Tracy, Lodi, Galt, Sonora, Los Banos, San Andreas, Mariposa, and Yosemite, the northern San Joaquin Valley (part of the Central Valley), …