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Map of California numbering plan areas (blue) and border states. Area code 831 is shown in red.

Area code 831 is a California telephone area code that was split from area code 408 on July 11, 1998.

It covers Monterey County, San Benito County, and Santa Cruz County.

Regions include Big Sur, Monterey Bay, the Salinas Valley, and the southwestern Santa Cruz Mountains.


Places in the 831 area codeEdit

See alsoEdit


  1. ^ "831 Area Code | Free Area Code Search". 2009-04-04. Retrieved 2019-06-15.

External linksEdit