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Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes. In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes.
If this map is the primary area code map of California (master map), no area code appears in red. Map is correct as of 2023-07-02. To make changes, updates, and replacing the lesser maps (the ones for a specific area code block), this file uses CSS to define the colors for each region.
Download QR code; Print/export ... Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for ...
0–9. Area codes 209 and 350; Area codes 213, 323, and 738; Area codes 310 and 424; Area codes 408 and 669; Area codes 415 and 628; Area codes 510 and 341
If this map is the primary area code map of California (master map), no area code appears in red. Map is correct as of 2023-07-02. To make changes, updates, and replacing the lesser maps (the ones for a specific area code block), this file uses CSS to define the colors for each region.
568 reserved as a fifth area code for the region. 369: California (Vallejo, Crescent City, Eureka, Redwoods National Park, Santa Rosa, Ukiah, and most of northwestern California) February 1, 2023: overlaid on 707; 370–379: not in use; reserved in case a block of consecutive numbers is ever needed 377 is an easily recognizable code (ERC) 380
An overlay “adds a second area code to the same geographic region.” Starting Jan. 31 residents will have access to a new 837 code, the state agency said in the Thursday news release. It will ...
This map is clickable; click on any region shown to visit the page for those area codes.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 1947.