Area code 831 — California (US)

Latest community reports for numbers starting with 831.

Related area codes

826 828 830 832 835 838

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Sub‑area codes

More specific prefixes within this large region.

83142 83164 83175 831333 831335 831336 831338 831372 831373 831375 831384 831385 831386 831393 831394 831422 831424 831430 831438 831439 831440 831442 831443 831444 831449 831454 831455 831457 831458 831459 831460 831466 831469 831479 831484 831600 831620 831622 831623 831624