831 Area Code: Location, Cities, Map And Time Zone

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Area Code 831

Area code 831 is in California, USA , spanning 3 counties and serving 40 cities , including Salinas, Santa Cruz or Watsonville; it currently uses 402 prefixes , assigned from 831-200-XXXX through 831-999-XXXX.

In service date for area code 831: July 11, 1998.

The current local time is .

831 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 831 area code map

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More California area codes:

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  • 949
  • 951

Locate any 831-NXX prefix:

831-200-XXXX --- 831-299-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-200 Monterey Multiple 11/26/2014
831-201 Santa Cruz Multiple 9/7/2016
831-202 Salinas Multiple 3/30/2018
831-203 Salinas Multiple 08/10/2023
831-204 Monterey Multiple N/A
831-205 Hollister Multiple 10/8/2009
831-206 Salinas Cellco Partnership N/A
831-207 Hollister Multiple 9/12/2001
831-208 Salinas Multiple 3/20/2019
831-210 Salinas Multiple 1/16/2002
831-212 Santa Cruz Multiple N/A
831-214 Salinas New Cingular Wireless PCS N/A
831-215 Monterey Multiple 10/2/2020
831-216 Felton Multiple N/A
831-217 Boulder Creek Multiple N/A
831-218 Ben Lomond Multiple N/A
831-219 Aptos Multiple N/A
831-220 Monterey Multiple 5/31/2018
831-221 San Ardo Multiple N/A
831-222 Felton Multiple N/A
831-223 Soledad Multiple N/A
831-224 Monterey Multiple 12/14/2001
831-225 Salinas Multiple 6/23/2015
831-226 Santa Cruz Multiple 7/16/2015
831-227 Santa Cruz Multiple N/A
831-228 Watsonville Multiple 9/21/2015
831-229 Salinas New Cingular Wireless PCS N/A
831-230 Monterey Multiple 12/15/2016
831-231 Greenfield Multiple 5/3/2019
831-232 Chualar Multiple N/A
831-233 Monterey Multiple N/A
831-234 Santa Cruz Cellco Partnership N/A
831-235 Salinas Cellco Partnership N/A
831-236 Monterey Cellco Partnership N/A
831-237 Soledad Multiple N/A
831-238 Carmel Multiple N/A
831-239 Santa Cruz New Cingular Wireless PCS N/A
831-240 Salinas Multiple N/A
831-241 Monterey Multiple N/A
831-242 Monterey Multiple N/A
831-243 Salinas Multiple 6/29/2020
831-244 Big Sur Multiple N/A
831-245 Hollister Multiple N/A
831-246 Ben Lomond Multiple N/A
831-247 Santa Cruz Cellco Partnership N/A
831-249 Big Sur Multiple 12/14/2009
831-250 Carmel Multiple N/A
831-251 Aptos New Cingular Wireless PCS N/A
831-252 Ben Lomond New Cingular Wireless PCS N/A
831-253 Salinas Multiple 12/4/2020
831-254 Watsonville New Cingular Wireless PCS N/A
831-255 Santa Cruz North County Communication Corporation N/A
831-256 Salinas Multiple 4/10/2015
831-257 Aptos Multiple 10/7/2016
831-258 Salinas Multiple 7/8/2016
831-259 Monterey Multiple 6/10/2022
831-260 Soledad Multiple 3/15/2022
831-261 Salinas New Cingular Wireless PCS N/A
831-262 Salinas Cellco Partnership N/A
831-263 King City Multiple N/A
831-264 Monterey Multiple N/A
831-265 Hollister Multiple 4/2/2008
831-266 Santa Cruz Multiple 3/24/2021
831-267 Big Sur Multiple 12/14/2006
831-268 Felton Multiple 7/15/2016
831-269 Salinas Multiple 6/21/2007
831-270 Salinas Multiple 6/10/2022
831-271 Hollister Multiple 6/23/2021
831-272 Salinas Multiple N/A
831-273 Salinas Onvoy 4/6/2017
831-274 Watsonville Multiple N/A
831-275 Monterey Multiple 10/23/2008
831-276 Salinas Multiple N/A
831-277 Monterey Cellco Partnership N/A
831-278 Ben Lomond Multiple N/A
831-279 Salinas Multiple 05/10/2023
831-280 Aptos Multiple 08/11/2023
831-281 Santa Cruz Multiple N/A
831-282 Monterey Multiple 9/17/2021
831-283 Carmel Valley Multiple 11/4/2022
831-284 Watsonville New Cingular Wireless PCS 08/28/2023
831-285 Watsonville Multiple 10/28/2022
831-286 Greenfield Onvoy 03/21/2024
831-287 Salinas Multiple 12/16/2008
831-288 Watsonville Multiple 6/11/2009
831-289 Ben Lomond Multiple 9/20/2022
831-290 Gonzales Multiple 6/26/2009
831-291 Santa Cruz Multiple 4/7/2014
831-292 Soledad Multiple 1/8/2019
831-293 Carmel Multiple 6/25/2008
831-294 Salinas Multiple 03/25/2024
831-295 Santa Cruz Multiple 12/14/2001
831-296 Salinas Multiple 7/12/2010
831-297 Hollister Multiple 12/14/2001
831-298 Carmel Valley Multiple N/A
831-299 Tres Pinos Multiple N/A
831-300-XXXX --- 831-394-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-300 Big Sur Multiple N/A
831-301 San Juan Multiple N/A
831-302 San Lucas Multiple N/A
831-303 San Ardo Multiple N/A
831-304 Greenfield Multiple N/A
831-305 Gonzales Multiple N/A
831-306 Chualar Multiple N/A
831-307 Castroville Multiple N/A
831-308 Carmel Valley Multiple N/A
831-309 Carmel Multiple 5/8/2017
831-312 Monterey Multiple 03/26/2024
831-313 Hollister Multiple 6/11/2009
831-314 Santa Cruz Shelcomm 09/12/2024
831-315 Soledad Multiple 2/15/2016
831-316 Santa Cruz Multiple N/A
831-317 Monterey Multiple 09/23/2024
831-318 Aptos Multiple 3/17/2016
831-319 Watsonville Multiple 4/17/2001
831-320 Salinas Cellco Partnership N/A
831-321 Salinas New Cingular Wireless PCS 12/06/2024
831-322 Watsonville Multiple 3/17/2016
831-324 Monterey Multiple N/A
831-325 Santa Cruz Multiple 4/25/2001
831-326 Salinas New Cingular Wireless PCS 12/06/2024
831-327 Hollister Multiple 12/30/2024
831-328 Salinas Multiple 03/13/2025
831-329 Salinas Multiple 04/21/2025
831-330 Carmel Multiple 12/06/2023
831-331 Santa Cruz Multiple N/A
831-332 Santa Cruz New Cingular Wireless PCS N/A
831-333 Monterey Multiple N/A
831-334 Santa Cruz New Cingular Wireless PCS N/A
831-335 Felton Pacific Bell N/A
831-336 Ben Lomond Multiple N/A
831-337 Boulder Creek Multiple N/A
831-338 Boulder Creek Pacific Bell N/A
831-339 Gonzales Multiple 09/04/2025
831-340 Santa Cruz Multiple 01/15/2026
831-345 Santa Cruz Cellco Partnership 11/13/2001
831-346 Santa Cruz Multiple 9/23/2014
831-348 Watsonville Multiple 3/20/2019
831-350 Tres Pinos Multiple 5/11/2006
831-353 Watsonville Multiple 7/18/2016
831-356 Salinas Multiple 12/2/2019
831-359 Santa Cruz Multiple N/A
831-366 Boulder Creek Multiple 2/23/2022
831-372 Monterey Pacific Bell N/A
831-373 Monterey Pacific Bell N/A
831-375 Monterey Pacific Bell N/A
831-382 San Lucas Multiple N/A
831-383 Monterey Multiple 9/13/2001
831-384 Monterey Pacific Bell N/A
831-385 King City Pacific Bell N/A
831-386 King City Multiple N/A
831-387 King City Multiple N/A
831-388 Greenfield Multiple 9/8/2022
831-389 Pinnacles Pinnacles Tel. Co. N/A
831-392 Monterey Multiple N/A
831-393 Monterey Multiple N/A
831-394 Monterey Pacific Bell N/A
831-400-XXXX --- 831-498-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-400 Santa Cruz Multiple N/A
831-401 Ben Lomond Multiple N/A
831-402 Monterey New Cingular Wireless PCS 11/13/2001
831-406 Watsonville Multiple 12/14/2001
831-417 Salinas Multiple N/A
831-419 Santa Cruz New Cingular Wireless PCS N/A
831-420 Santa Cruz Multiple N/A
831-421 Santa Cruz Multiple N/A
831-422 Salinas Pacific Bell N/A
831-423 Santa Cruz Pacific Bell N/A
831-424 Salinas Pacific Bell N/A
831-425 Santa Cruz Multiple N/A
831-426 Santa Cruz Pacific Bell N/A
831-427 Santa Cruz Multiple N/A
831-428 Santa Cruz Multiple N/A
831-429 Santa Cruz Pacific Bell N/A
831-430 Santa Cruz Multiple N/A
831-431 Santa Cruz Multiple N/A
831-432 Boulder Creek Multiple 12/21/2020
831-435 Santa Cruz Multiple N/A
831-438 Santa Cruz Pacific Bell N/A
831-439 Santa Cruz Multiple N/A
831-440 Santa Cruz Multiple N/A
831-442 Salinas Multiple N/A
831-443 Salinas Pacific Bell N/A
831-444 Salinas Multiple N/A
831-449 Salinas Pacific Bell N/A
831-453 Castroville Multiple 1/25/2011
831-454 Santa Cruz Multiple N/A
831-455 Salinas Multiple N/A
831-457 Santa Cruz Pacific Bell N/A
831-458 Santa Cruz Pacific Bell N/A
831-459 Santa Cruz Pacific Bell N/A
831-460 Santa Cruz Multiple N/A
831-461 Santa Cruz Multiple N/A
831-462 Santa Cruz Pacific Bell N/A
831-464 Santa Cruz Pacific Bell N/A
831-465 Santa Cruz Multiple N/A
831-466 Santa Cruz Multiple N/A
831-469 Santa Cruz Multiple N/A
831-471 Santa Cruz Multiple N/A
831-475 Santa Cruz Pacific Bell N/A
831-476 Santa Cruz Pacific Bell N/A
831-477 Santa Cruz Multiple N/A
831-479 Santa Cruz Pacific Bell N/A
831-480 Santa Cruz Onvoy N/A
831-484 Salinas Multiple N/A
831-498 Watsonville Multiple N/A
831-500-XXXX --- 831-597-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-500 Salinas Multiple N/A
831-502 Santa Cruz Pacific Bell N/A
831-508 Felton Multiple N/A
831-512 Salinas Multiple N/A
831-515 Santa Cruz Multiple N/A
831-521 Monterey New Cingular Wireless PCS N/A
831-524 Hollister New Cingular Wireless PCS N/A
831-525 King City Multiple N/A
831-529 Santa Cruz Multiple 3/27/2020
831-531 Aptos Multiple N/A
831-532 Ben Lomond Multiple N/A
831-533 Boulder Creek Multiple N/A
831-534 Felton Multiple N/A
831-535 Santa Cruz Multiple N/A
831-536 Watsonville Multiple N/A
831-537 Hollister Multiple N/A
831-539 Watsonville Multiple N/A
831-540 Salinas Multiple N/A
831-566 Santa Cruz Cellco Partnership 6/14/2002
831-572 Aptos Utility Telecom Group N/A
831-574 Carmel Multiple N/A
831-576 Santa Cruz Multiple N/A
831-578 Salinas New Cingular Wireless PCS N/A
831-580 Gonzales Multiple 5/1/2001
831-582 Monterey Multiple N/A
831-583 Monterey Multiple N/A
831-585 Salinas Multiple 2/18/2005
831-586 San Juan Multiple 5/1/2001
831-587 Watsonville Multiple 8/23/2021
831-588 Santa Cruz Cellco Partnership N/A
831-593 San Juan Multiple N/A
831-594 Salinas New Cingular Wireless PCS N/A
831-595 Salinas New Cingular Wireless PCS N/A
831-596 Salinas New Cingular Wireless PCS N/A
831-597 Salinas Multiple N/A
831-600-XXXX --- 831-699-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-600 Santa Cruz Multiple N/A
831-601 Monterey Cellco Partnership N/A
831-603 Aptos Onvoy N/A
831-604 Ben Lomond Onvoy N/A
831-607 Aptos Multiple N/A
831-609 Ben Lomond Multiple N/A
831-610 Boulder Creek Multiple N/A
831-612 Aptos Multiple N/A
831-613 Greenfield Multiple N/A
831-618 Boulder Creek Onvoy N/A
831-620 Carmel Multiple N/A
831-621 Santa Cruz Multiple N/A
831-622 Carmel Pacific Bell N/A
831-623 San Juan Multiple N/A
831-624 Carmel Pacific Bell N/A
831-625 Carmel Pacific Bell N/A
831-626 Carmel Pacific Bell N/A
831-627 San Ardo Multiple N/A
831-628 Tres Pinos Multiple N/A
831-630 Hollister Multiple N/A
831-632 Castroville Multiple N/A
831-633 Castroville Pacific Bell N/A
831-634 Hollister Pacific Bell N/A
831-635 Hollister Multiple N/A
831-636 Hollister Pacific Bell N/A
831-637 Hollister Pacific Bell N/A
831-638 Hollister Pacific Bell N/A
831-641 Monterey Multiple N/A
831-642 Monterey Pacific Bell N/A
831-643 Monterey Multiple N/A
831-644 Monterey Pacific Bell N/A
831-645 Monterey Pacific Bell N/A
831-646 Monterey Pacific Bell N/A
831-647 Monterey Pacific Bell N/A
831-648 Monterey Pacific Bell N/A
831-649 Monterey Multiple N/A
831-652 Carmel Valley Multiple N/A
831-653 San Lucas Multiple 5/1/2001
831-655 Monterey Pacific Bell N/A
831-656 Monterey Multiple N/A
831-657 Monterey Multiple N/A
831-658 Monterey Pacific Bell N/A
831-659 Carmel Valley Multiple N/A
831-661 Aptos Multiple N/A
831-662 Aptos Pacific Bell N/A
831-663 Salinas Multiple N/A
831-664 Hollister Multiple N/A
831-665 Hollister Multiple N/A
831-666 Watsonville Multiple N/A
831-667 Big Sur Multiple N/A
831-673 Hollister New Cingular Wireless PCS N/A
831-674 Greenfield Multiple N/A
831-675 Gonzales Multiple N/A
831-676 Salinas Multiple 8/30/2002
831-677 Soledad Multiple N/A
831-678 Soledad Pacific Bell N/A
831-679 Chualar Multiple N/A
831-682 Salinas Cellco Partnership 3/9/2001
831-684 Aptos Multiple N/A
831-685 Aptos Pacific Bell N/A
831-687 Aptos Multiple N/A
831-688 Aptos Pacific Bell N/A
831-689 Aptos Multiple N/A
831-693 Idria Pinnacles Tel. Co. N/A
831-699 Felton Multiple 12/21/2020
831-703-XXXX --- 831-796-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-703 Boulder Creek Multiple N/A
831-704 Felton Multiple N/A
831-705 Chualar Multiple 3/13/2002
831-706 Santa Cruz Multiple N/A
831-707 Watsonville Multiple N/A
831-708 Aptos Multiple N/A
831-709 Ben Lomond Multiple N/A
831-710 Salinas Multiple 4/12/2002
831-713 Santa Cruz Multiple N/A
831-717 Monterey Multiple N/A
831-718 Monterey Multiple 8/16/2005
831-722 Watsonville Pacific Bell N/A
831-724 Watsonville Pacific Bell N/A
831-726 Watsonville Multiple N/A
831-728 Watsonville Pacific Bell N/A
831-731 Castroville Multiple 5/1/2001
831-732 San Ardo Multiple N/A
831-737 Salinas Multiple 3/28/2006
831-740 Watsonville Multiple N/A
831-741 Castroville Multiple N/A
831-744 Gonzales Multiple N/A
831-747 Monterey Multiple 4/6/2005
831-750 Watsonville Multiple N/A
831-751 Salinas Pacific Bell N/A
831-753 Salinas Pacific Bell N/A
831-754 Salinas Pacific Bell N/A
831-755 Salinas Pacific Bell N/A
831-756 Salinas Multiple 9/12/2005
831-757 Salinas Pacific Bell N/A
831-758 Salinas Pacific Bell N/A
831-759 Salinas Pacific Bell N/A
831-760 Monterey Multiple N/A
831-761 Watsonville Pacific Bell N/A
831-763 Watsonville Pacific Bell N/A
831-768 Watsonville Pacific Bell N/A
831-769 Salinas Multiple N/A
831-770 Salinas Multiple N/A
831-771 Salinas Pacific Bell N/A
831-772 Salinas Pacific Bell N/A
831-774 Gonzales Multiple 4/27/2005
831-775 Salinas Multiple N/A
831-776 Salinas MetroPCS 7/12/2001
831-777 Santa Cruz Multiple 8/17/2015
831-778 San Lucas Multiple N/A
831-783 Salinas Multiple N/A
831-784 Salinas Multiple N/A
831-785 Salinas Multiple N/A
831-786 Watsonville Multiple N/A
831-788 Salinas Multiple 5/31/2022
831-789 Salinas Multiple N/A
831-794 Salinas MetroPCS 9/13/2001
831-796 Salinas Multiple N/A
831-800-XXXX --- 831-899-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-800 Salinas Multiple 10/15/2010
831-801 Hollister Cellco Partnership N/A
831-808 Soledad Multiple 12/06/2023
831-809 Salinas Cellco Partnership N/A
831-818 Santa Cruz Cellco Partnership N/A
831-821 Tres Pinos Multiple N/A
831-824 Santa Cruz Multiple N/A
831-830 King City Multiple 7/24/2020
831-833 Hollister Multiple 2/24/2022
831-837 Salinas Multiple 1/10/2022
831-840 Watsonville New Cingular Wireless PCS N/A
831-842 Aptos Multiple 11/21/2021
831-844 Big Sur Multiple N/A
831-850 Felton Multiple N/A
831-851 Watsonville Onvoy N/A
831-854 Santa Cruz Multiple N/A
831-855 Monterey Multiple N/A
831-856 Greenfield Multiple 5/1/2001
831-859 Salinas Multiple 06/20/2024
831-867 Monterey Multiple 3/24/2017
831-869 Monterey Multiple 7/12/2001
831-877 Carmel Multiple 3/20/2019
831-881 Monterey Wide Voice 10/30/2025
831-883 Monterey Multiple N/A
831-884 Monterey Multiple N/A
831-886 Monterey Multiple N/A
831-887 Monterey Multiple N/A
831-888 Santa Cruz Multiple N/A
831-889 Santa Cruz Multiple 6/27/2018
831-899 Monterey Pacific Bell N/A
831-900-XXXX --- 831-999-XXXX
NPANXX Area served[1] Provider[2] Date[3]
831-900 Santa Cruz Multiple N/A
831-901 Monterey Multiple N/A
831-902 Hollister Multiple N/A
831-905 Salinas New Cingular Wireless PCS N/A
831-915 Monterey New Cingular Wireless PCS N/A
831-917 Monterey New Cingular Wireless PCS N/A
831-920 Monterey Multiple 6/3/2005
831-921 Tres Pinos Multiple N/A
831-931 King City Multiple 12/06/2023
831-946 Santa Cruz Multiple 7/13/2021
831-948 Watsonville Utility Telecom Group 4/3/2015
831-970 Salinas Multiple N/A
831-975 Salinas Multiple N/A
831-996 Tres Pinos Multiple 5/1/2001
831-998 Salinas Multiple 7/17/2003
831-999 Santa Cruz Multiple 4/6/2016
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: February 13, 2026

Cities in area code 831

City1 County Time zone1
Aptos Santa Cruz P
Aromas Monterey P
Ben Lomond Santa Cruz P
Big Sur Monterey P
Boulder Creek Santa Cruz P
Brookdale Santa Cruz P
Capitola Santa Cruz P
Carmel Monterey P
Carmel Valley Monterey P
Carmel-by-the-Sea Monterey P
Castroville Monterey P
Chualar Monterey P
Davenport Santa Cruz P
Felton Santa Cruz P
Freedom Santa Cruz P
Gonzales Monterey P
Greenfield Monterey P
Hollister San Benito P
Jolon Monterey P
King City Monterey P
Lockwood Monterey P
Marina Monterey P
Monterey Monterey P
Moss Landing Monterey P
Mount Hermon Santa Cruz P
Pacific Grove Monterey P
Paicines San Benito P
Pebble Beach Monterey P
Salinas Monterey P
San Ardo Monterey P
San Juan Bautista San Benito P
San Lucas Monterey P
Santa Cruz Santa Cruz P
Scotts Valley Santa Cruz P
Seaside Monterey P
Soledad Monterey P
Soquel Santa Cruz P
Spreckels Monterey P
Tres Pinos San Benito P
Watsonville Santa Cruz P
  1. Listed above are most places served by USA area code 831. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. P stands for Pacific Time (currently ).
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