California
(350) Area Code 350 — Stockton, California
350 Area Code – Stockton, California: Location, Time Zone & History
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Map of Area Code 350
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History & Cultural Notes
Stockton anchors the newest layer of telephone numbering in California's northern San Joaquin Valley. On November 28, 2022, the California Public Utilities Commission activated 350 as an all-services overlay across the entire 209 service territory, a step taken to head off the exhaustion of available central office codes as the region's population and business activity continued to expand.
Because 350 is an overlay rather than a geographic split, it shares its full footprint with area code 209, spanning the northern San Joaquin Valley and the Sierra Foothills. The territory extends well beyond Stockton to include Modesto, Merced, Tracy, Manteca, and Turlock, forming one of the more populous inland corridors in the state.
The local economy reflects the valley's mix of agricultural roots and logistical growth, with several sectors sharing the load:
- Agriculture
- Logistics and distribution
- Healthcare
- Government
- Food processing
Together these industries illustrate how the region has grown from a farming-centered economy into a broader hub serving the northern San Joaquin Valley, with Stockton's port and transportation links feeding the distribution and food-processing sectors that now sit alongside longstanding agricultural production.