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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 390 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 09:35:46 AM (Pacific Time Zone).

831 area code location on a map

*For exact NPA boundaries see official 831 area code map

More California area codes:

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Locate any 831-NXX prefix:

NPANXX Area served1 Date2
831-200 Monterey 11/26/2014
831-201 Santa Cruz 9/7/2016
831-202 Salinas 3/30/2018
831-203 Salinas 08/10/2023
831-204 Monterey N/A
831-205 Hollister 10/8/2009
831-206 Salinas N/A
831-207 Hollister 9/12/2001
831-208 Salinas 3/20/2019
831-210 Salinas 1/16/2002
831-212 Santa Cruz N/A
831-214 Salinas N/A
831-215 Monterey 10/2/2020
831-216 Felton N/A
831-217 Boulder Creek N/A
831-218 Ben Lomond N/A
831-219 Aptos N/A
831-220 Monterey 5/31/2018
831-221 San Ardo N/A
831-222 Felton N/A
831-223 Soledad N/A
831-224 Monterey 12/14/2001
831-225 Salinas 6/23/2015
831-226 Santa Cruz 7/16/2015
831-227 Santa Cruz N/A
831-228 Watsonville 9/21/2015
831-229 Salinas N/A
831-230 Monterey 12/15/2016
831-231 Greenfield 5/3/2019
831-232 Chualar N/A
831-233 Monterey N/A
831-234 Santa Cruz N/A
831-235 Salinas N/A
831-236 Monterey N/A
831-237 Soledad N/A
831-238 Carmel N/A
831-239 Santa Cruz N/A
831-240 Salinas N/A
831-241 Monterey N/A
831-242 Monterey N/A
831-243 Salinas 6/29/2020
831-244 Big Sur N/A
831-245 Hollister N/A
831-246 Ben Lomond N/A
831-247 Santa Cruz N/A
831-249 Big Sur 12/14/2009
831-250 Carmel N/A
831-251 Aptos N/A
831-252 Ben Lomond N/A
831-253 Salinas 12/4/2020
831-254 Watsonville N/A
831-255 Santa Cruz N/A
831-256 Salinas 4/10/2015
831-257 Aptos 10/7/2016
831-258 Salinas 7/8/2016
831-259 Monterey 6/10/2022
831-260 Soledad 3/15/2022
831-261 Salinas N/A
831-262 Salinas N/A
831-263 King City N/A
831-264 Monterey N/A
831-265 Hollister 4/2/2008
831-266 Santa Cruz 3/24/2021
831-267 Big Sur 12/14/2006
831-268 Felton 7/15/2016
831-269 Salinas 6/21/2007
831-270 Salinas 6/10/2022
831-271 Hollister 6/23/2021
831-272 Salinas N/A
831-273 Salinas 4/6/2017
831-274 Watsonville N/A
831-275 Monterey 10/23/2008
831-276 Salinas N/A
831-277 Monterey N/A
831-278 Ben Lomond N/A
831-279 Salinas 05/10/2023
831-280 Aptos 08/11/2023
831-281 Santa Cruz N/A
831-282 Monterey 9/17/2021
831-283 Carmel Valley 11/4/2022
831-284 Watsonville 08/28/2023
831-285 Watsonville 10/28/2022
831-287 Salinas 12/16/2008
831-288 Watsonville 6/11/2009
831-289 Ben Lomond 9/20/2022
831-290 Gonzales 6/26/2009
831-291 Santa Cruz 4/7/2014
831-292 Soledad 1/8/2019
831-293 Carmel 6/25/2008
831-295 Santa Cruz 12/14/2001
831-296 Salinas 7/12/2010
831-297 Hollister 12/14/2001
831-298 Carmel Valley N/A
831-299 Tres Pinos N/A

NPANXX Area served1 Date2
831-300 Big Sur N/A
831-301 San Juan N/A
831-302 San Lucas N/A
831-303 San Ardo N/A
831-304 Greenfield N/A
831-305 Gonzales N/A
831-306 Chualar N/A
831-307 Castroville N/A
831-308 Carmel Valley N/A
831-309 Carmel 5/8/2017
831-313 Hollister 6/11/2009
831-315 Soledad 2/15/2016
831-316 Santa Cruz N/A
831-318 Aptos 3/17/2016
831-319 Watsonville 4/17/2001
831-320 Salinas N/A
831-322 Watsonville 3/17/2016
831-324 Monterey N/A
831-325 Santa Cruz 4/25/2001
831-330 Carmel 12/06/2023
831-331 Santa Cruz N/A
831-332 Santa Cruz N/A
831-333 Monterey N/A
831-334 Santa Cruz N/A
831-335 Felton N/A
831-336 Ben Lomond N/A
831-337 Boulder Creek N/A
831-338 Boulder Creek N/A
831-345 Santa Cruz 11/13/2001
831-346 Santa Cruz 9/23/2014
831-348 Watsonville 3/20/2019
831-350 Tres Pinos 5/11/2006
831-353 Watsonville 7/18/2016
831-356 Salinas 12/2/2019
831-359 Santa Cruz N/A
831-366 Boulder Creek 2/23/2022
831-372 Monterey N/A
831-373 Monterey N/A
831-375 Monterey N/A
831-382 San Lucas N/A
831-383 Monterey 9/13/2001
831-384 Monterey N/A
831-385 King City N/A
831-386 King City N/A
831-387 King City N/A
831-388 Greenfield 9/8/2022
831-389 Pinnacles N/A
831-392 Monterey N/A
831-393 Monterey N/A
831-394 Monterey N/A

NPANXX Area served1 Date2
831-400 Santa Cruz N/A
831-401 Ben Lomond N/A
831-402 Monterey 11/13/2001
831-406 Watsonville 12/14/2001
831-417 Salinas N/A
831-419 Santa Cruz N/A
831-420 Santa Cruz N/A
831-421 Santa Cruz N/A
831-422 Salinas N/A
831-423 Santa Cruz N/A
831-424 Salinas N/A
831-425 Santa Cruz N/A
831-426 Santa Cruz N/A
831-427 Santa Cruz N/A
831-428 Santa Cruz N/A
831-429 Santa Cruz N/A
831-430 Santa Cruz N/A
831-431 Santa Cruz N/A
831-432 Boulder Creek 12/21/2020
831-435 Santa Cruz N/A
831-438 Santa Cruz N/A
831-439 Santa Cruz N/A
831-440 Santa Cruz N/A
831-442 Salinas N/A
831-443 Salinas N/A
831-444 Salinas N/A
831-449 Salinas N/A
831-453 Castroville 1/25/2011
831-454 Santa Cruz N/A
831-455 Salinas N/A
831-457 Santa Cruz N/A
831-458 Santa Cruz N/A
831-459 Santa Cruz N/A
831-460 Santa Cruz N/A
831-461 Santa Cruz N/A
831-462 Santa Cruz N/A
831-464 Santa Cruz N/A
831-465 Santa Cruz N/A
831-466 Santa Cruz N/A
831-469 Santa Cruz N/A
831-471 Santa Cruz N/A
831-475 Santa Cruz N/A
831-476 Santa Cruz N/A
831-477 Santa Cruz N/A
831-479 Santa Cruz N/A
831-480 Santa Cruz N/A
831-484 Salinas N/A
831-498 Watsonville N/A

NPANXX Area served1 Date2
831-500 Salinas N/A
831-502 Santa Cruz N/A
831-508 Felton N/A
831-512 Salinas N/A
831-515 Santa Cruz N/A
831-521 Monterey N/A
831-524 Hollister N/A
831-525 King City N/A
831-529 Santa Cruz 3/27/2020
831-531 Aptos N/A
831-532 Ben Lomond N/A
831-533 Boulder Creek N/A
831-534 Felton N/A
831-535 Santa Cruz N/A
831-536 Watsonville N/A
831-537 Hollister N/A
831-539 Watsonville N/A
831-540 Salinas N/A
831-566 Santa Cruz 6/14/2002
831-572 Aptos N/A
831-574 Carmel N/A
831-576 Santa Cruz N/A
831-578 Salinas N/A
831-580 Gonzales 5/1/2001
831-582 Monterey N/A
831-583 Monterey N/A
831-585 Salinas 2/18/2005
831-586 San Juan 5/1/2001
831-587 Watsonville 8/23/2021
831-588 Santa Cruz N/A
831-593 San Juan N/A
831-594 Salinas N/A
831-595 Salinas N/A
831-596 Salinas N/A
831-597 Salinas N/A
831-598 Salinas N/A

NPANXX Area served1 Date2
831-600 Santa Cruz N/A
831-601 Monterey N/A
831-603 Aptos N/A
831-604 Ben Lomond N/A
831-607 Aptos N/A
831-609 Ben Lomond N/A
831-610 Boulder Creek N/A
831-612 Aptos N/A
831-613 Greenfield N/A
831-618 Boulder Creek N/A
831-620 Carmel N/A
831-621 Santa Cruz N/A
831-622 Carmel N/A
831-623 San Juan N/A
831-624 Carmel N/A
831-625 Carmel N/A
831-626 Carmel N/A
831-627 San Ardo N/A
831-628 Tres Pinos N/A
831-630 Hollister N/A
831-632 Castroville N/A
831-633 Castroville N/A
831-634 Hollister N/A
831-635 Hollister N/A
831-636 Hollister N/A
831-637 Hollister N/A
831-638 Hollister N/A
831-641 Monterey N/A
831-642 Monterey N/A
831-643 Monterey N/A
831-644 Monterey N/A
831-645 Monterey N/A
831-646 Monterey N/A
831-647 Monterey N/A
831-648 Monterey N/A
831-649 Monterey N/A
831-652 Carmel Valley N/A
831-653 San Lucas 5/1/2001
831-655 Monterey N/A
831-656 Monterey N/A
831-657 Monterey N/A
831-658 Monterey N/A
831-659 Carmel Valley N/A
831-661 Aptos N/A
831-662 Aptos N/A
831-663 Salinas N/A
831-664 Hollister N/A
831-665 Hollister N/A
831-666 Watsonville N/A
831-667 Big Sur N/A
831-673 Hollister N/A
831-674 Greenfield N/A
831-675 Gonzales N/A
831-676 Salinas 8/30/2002
831-677 Soledad N/A
831-678 Soledad N/A
831-679 Chualar N/A
831-682 Salinas 3/9/2001
831-684 Aptos N/A
831-685 Aptos N/A
831-687 Aptos N/A
831-688 Aptos N/A
831-689 Aptos N/A
831-693 Idria N/A
831-699 Felton 12/21/2020

NPANXX Area served1 Date2
831-703 Boulder Creek N/A
831-704 Felton N/A
831-705 Chualar 3/13/2002
831-706 Santa Cruz N/A
831-707 Watsonville N/A
831-708 Aptos N/A
831-709 Ben Lomond N/A
831-710 Salinas 4/12/2002
831-713 Santa Cruz N/A
831-717 Monterey N/A
831-718 Monterey 8/16/2005
831-722 Watsonville N/A
831-724 Watsonville N/A
831-726 Watsonville N/A
831-728 Watsonville N/A
831-731 Castroville 5/1/2001
831-732 San Ardo N/A
831-737 Salinas 3/28/2006
831-740 Watsonville N/A
831-741 Castroville N/A
831-744 Gonzales N/A
831-747 Monterey 4/6/2005
831-750 Watsonville N/A
831-751 Salinas N/A
831-753 Salinas N/A
831-754 Salinas N/A
831-755 Salinas N/A
831-756 Salinas 9/12/2005
831-757 Salinas N/A
831-758 Salinas N/A
831-759 Salinas N/A
831-760 Monterey N/A
831-761 Watsonville N/A
831-763 Watsonville N/A
831-768 Watsonville N/A
831-769 Salinas N/A
831-770 Salinas N/A
831-771 Salinas N/A
831-772 Salinas N/A
831-774 Gonzales 4/27/2005
831-775 Salinas N/A
831-776 Salinas 7/12/2001
831-777 Santa Cruz 8/17/2015
831-778 San Lucas N/A
831-783 Salinas N/A
831-784 Salinas N/A
831-785 Salinas N/A
831-786 Watsonville N/A
831-788 Salinas 5/31/2022
831-789 Salinas N/A
831-794 Salinas 9/13/2001
831-796 Salinas N/A

NPANXX Area served1 Date2
831-800 Salinas 10/15/2010
831-801 Hollister N/A
831-808 Soledad 12/06/2023
831-809 Salinas N/A
831-818 Santa Cruz N/A
831-821 Tres Pinos N/A
831-824 Santa Cruz N/A
831-830 King City 7/24/2020
831-833 Hollister 2/24/2022
831-837 Salinas 1/10/2022
831-840 Watsonville N/A
831-842 Aptos 11/21/2021
831-844 Big Sur N/A
831-850 Felton N/A
831-851 Watsonville N/A
831-854 Santa Cruz N/A
831-855 Monterey N/A
831-856 Greenfield 5/1/2001
831-867 Monterey 3/24/2017
831-869 Monterey 7/12/2001
831-877 Carmel 3/20/2019
831-883 Monterey N/A
831-884 Monterey N/A
831-886 Monterey N/A
831-887 Monterey N/A
831-888 Santa Cruz N/A
831-889 Santa Cruz 6/27/2018
831-899 Monterey N/A

NPANXX Area served1 Date2
831-900 Santa Cruz N/A
831-901 Monterey N/A
831-902 Hollister N/A
831-905 Salinas N/A
831-912 Monterey N/A
831-915 Monterey N/A
831-917 Monterey N/A
831-920 Monterey 6/3/2005
831-921 Tres Pinos N/A
831-931 King City 12/06/2023
831-946 Santa Cruz 7/13/2021
831-948 Watsonville 4/3/2015
831-970 Salinas N/A
831-975 Salinas N/A
831-996 Tres Pinos 5/1/2001
831-998 Salinas 7/17/2003
831-999 Santa Cruz 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. Assignment date. N/A - mostly central office codes assigned before 2001.
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Cities in area code 831

City1 County Time2
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 Zone (currently 09:35:46 AM).
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