{{short description|Area codes in northern Central Valley, California}} {{Use mdy dates|date=March 2026}} {{Use American English|date=March 2026}} {{California area codes image map|209}} '''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 the northern San Joaquin Valley and Sierra Foothills, including Stockton, Modesto and Merced.
Area code 209 was created in an area code split of area code 916 in 1958. 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 ten-digit dialing despite not being part of an overlay complex at that time. The area code had telephone numbers assigned for the central office code 988, which was designated as a nationwide three-digit dialing code for the 988 Suicide & Crisis Lifeline in 2022. This created a conflict for all NPAs with central office code 988 that still permitted seven-digit dialing,<ref name="pl556">{{cite web |url=https://nationalnanpa.com/pdf/PL_556.pdf |url-status=dead |archive-url=https://web.archive.org/web/20210423013529/https://nationalnanpa.com/pdf/PL_556.pdf |archive-date=2021-04-23 |title=Planning Letter PL-556: Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline) |publisher=North American Numbering Plan Administrator |date=2021-01-08 |access-date=2021-03-09 }}</ref> requiring all such NPAs to transition to ten-digit dialing.
On November 28, 2022, the 209 numbering plan area was assigned a second area code, 350, to form an overlay complex to address the impending central office code exhaustion in 209 from growth in telecommunication services.<ref>{{cite web |url=https://nationalnanpa.com/reports/Changes_from_Oct2020_%20NRUF_Forecast.pdf |archive-url=https://web.archive.org/web/20210419010219/https://nationalnanpa.com/reports/Changes_from_Oct2020_%20NRUF_Forecast.pdf |url-status=dead |archive-date=2021-04-19 |title=October 2020 NPA Exhaust Analysis–Changes as of March 29, 2021 |date=2021-03-29 |publisher=NANPA }}</ref> Network preparation was expedited without permissive dialing period, since ten-digit dialing was already in effect.<ref>{{cite web |url=https://www.abc10.com/article/news/local/stockton/350-area-code-209/103-29a21505-7f2b-436d-b8bf-4b990121ff36 |title=350: The new area code you'll be seeing in the 209 area |date=2022-05-20 }}</ref>
==Service area== ;Counties: :Alpine, Amador, Calaveras, El Dorado, Mariposa, Merced, Sacramento, San Joaquin, Stanislaus, Tuolumne
;Towns and cities: :Acampo, Big Oak Flat, Burson, Ceres, Chinese Camp, Coarsegold, Clements, Columbia, Crows Landing, Dardanelle, Delhi, Denair, El Portal, Empire, Escalon, Farmington, French Camp, Galt, Groveland, Hathaway Pines, Herald, Hickman, Hilmar, Holt, Hornitos, Hughson, Jamestown, Keyes, Kit Carson, La Grange, Lathrop, Le Grand, Linden, Lockeford, Lodi, Long Barn, Manteca, Mi Wuk Village, Midpines, Moccasin, Modesto, Mount Aukum, Mountain House, Newman, Oakdale, Patterson, Pinecrest, Planada, Ripon, River Pines, Riverbank, Salida, Santa Rita Park, Sheep Ranch, Sonora, Soulsbyville, Standard, Stevinson, Stockton, Thornton, Tracy, Tuolumne, Turlock, Twain Harte, Vernalis, Victor, Waterford, Westley, Wilseyville, Woodbridge, and Yosemite National Park
;Amador County: {{div col|colwidth=9em}} * Amador City * Buckhorn * Buena Vista * Drytown * Fiddletown * Ham's Station * Ione * Jackson * Martell * Pine Grove * Pioneer * Plymouth * Sutter Creek * Volcano {{div col end}}
;Calaveras County: {{div col|colwidth=9em}} * Altaville * Angels Camp * Arnold * Avery * Calaveritas * Campo Seco * Cave City * Copperopolis * Dorrington * Douglas Flat * Forest Meadows * Fourth Crossing * Glencoe * Jenny Lind * Jesus Maria * Mokelumne Hill * Mountain Ranch * Murphys * Paloma * Rail Road Flat * Rancho Calaveras * San Andreas * Sandy Gulch * Vallecito * Valley Springs * Wallace * West Point {{div col end}}
;Mariposa County: {{div col|colwidth=9em}} * Bootjack * Buck Meadows * Catheys Valley * Coulterville * Mariposa * Wawona * Yosemite Valley {{div col end}}
;Merced County: {{div col|colwidth=9em}} * Atwater * Ballico * Cressey * Delhi * Dos Palos * El Nido * Gustine * Hilmar * Le Grand * Livingston * Los Banos * Merced * Planada * Santa Nella * Snelling * South Dos Palos * Winton {{div col end}}
;Sacramento County: * Galt * Herald
;San Joaquin County: {{div col|colwidth=9em}} * August * Banta * Country Club * Escalon * Farmington * French Camp * Garden Acres * Kennedy * Lathrop * Lincoln Village * Linden * Lockeford * Lodi * Manteca * Morada * Mountain House * North Woodbridge * Ripon * South Woodbridge * Stockton * Taft Mosswood * Tracy * Victor {{div col end}}
;Stanislaus County: {{div col|colwidth=9em}} * Bystrom * Ceres * Del Rio * Denair * East Oakdale * Empire * Grayson * Hickman * Hughson * Keyes * Knights Ferry * Modesto * Newman * Oakdale * Patterson * Riverbank * Riverdale Park * Salida * Shackelford * Turlock * Waterford * West Modesto * Westley {{div col end}}
;Tuolumne County: {{div col|colwidth=9em}} * Bret Harte * Chinese Camp * Columbia * Confidence * East Sonora * Groveland-Big Oak Flat * Jamestown * Mi-Wuk Village * Moccasin * Mono Vista * Phoenix Lake-Cedar Ridge * Pine Mountain Lake * Sonora * Soulsbyville * Strawberry * Tuolumne City * Twain Harte {{div col end}}
==See also== * List of California area codes
==References== {{Reflist}}
==External links== {{Area_code_footer|Map=CA}}
{{Area code box|State=CA | This=209/350 | N= 530, 916/279 | S= 559, 831 | E= 760/442 | W= 408/669, 279/916, 925 }}
{{coord|38|-121|region:US-CA|display=title}}
209 Category:Amador County, California Category:Calaveras County, California Category:El Dorado County, California Category:Mariposa County, California Category:Merced County, California Category:San Joaquin County, California Category:Stanislaus County, California Category:Tuolumne County, California Category:San Joaquin Valley Category:Sierra Nevada (United States) Category:Telecommunications-related introductions in 1958 Category:Telecommunications-related introductions in 2022 209 350