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 392 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 .
For exact NPA boundaries see official 831 area code map
More California area codes:
- 209
- 213
- 279
- 310
- 323
- 341
- 350
- 369
- 408
- 415
- 424
- 442
- 510
- 530
- 559
- 562
- 619
- 626
- 628
- 650
- 657
- 661
- 669
- 707
- 714
- 738
- 747
- 760
- 805
- 818
- 820
- 840
- 858
- 909
- 916
- 925
- 949
- 951
Reverse phone lookup
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 |
| 831-286 | Greenfield | 03/21/2024 |
| 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 |
| 831-294 | Salinas | 03/25/2024 |
| 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 |
| 831-312 | Monterey | 03/26/2024 |
| 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 |
| 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 |
| 831-859 | Salinas | 06/20/2024 |
| 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 |
| 831-915 | 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 |
- 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.
- Assignment date. N/A - mostly central office codes assigned before 2001.
- NXX prefixes last updated: August 27, 2024
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 |
- 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.
- P stands for Pacific Time (currently ).