Area code 840 is in California (CA), USA and some of the main locations it covers are San Bernardino, Rancho Cucamonga, Pomona, etc. (jump to city list below).
In service since February 23, 2021, area code 840 is an overlay Numbering Plan Area, part of overlay complex 909/840 (overlaying NPAs cover the same area).
The current time for places served by area code 840 is 01:03:46 PM (Pacific Time Zone).
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 840-200 | Chino | 1/4/2021 |
| 840-201 | Fontana | 3/11/2021 |
| 840-202 | Pomona | 7/29/2021 |
| 840-203 | San Bernardino | 7/29/2021 |
| 840-204 | San Bernardino | 7/29/2021 |
| 840-205 | Claremont | 10/27/2021 |
| 840-206 | Chino | 8/10/2021 |
| 840-207 | Arrowhead | 10/28/2021 |
| 840-208 | Claremont | 2/22/2022 |
| 840-209 | Arrowhead | 8/31/2021 |
| 840-210 | Fontana | 12/14/2021 |
| 840-212 | Chino | 11/15/2021 |
| 840-213 | Redlands | 8/12/2022 |
| 840-214 | Marshall | 8/12/2022 |
| 840-215 | Highland | 2/28/2022 |
| 840-216 | Arrowhead | 3/1/2022 |
| 840-217 | Fontana | 9/2/2022 |
| 840-218 | Chino | 10/10/2022 |
| 840-219 | Calimesa | 9/13/2021 |
| 840-220 | Rialto | 9/13/2022 |
| 840-221 | San Bernardino | 10/21/2022 |
| 840-222 | San Bernardino | 12/24/2020 |
| 840-223 | Calimesa | 10/24/2022 |
| 840-224 | San Bernardino | 12/6/2022 |
| 840-225 | Pomona | 03/10/2023 |
| 840-226 | Pomona | 04/07/2023 |
| 840-227 | San Bernardino | 04/13/2023 |
| 840-228 | Colton | 04/17/2023 |
| 840-229 | Claremont | 04/18/2023 |
| 840-230 | Pomona | 05/30/2023 |
| 840-231 | Pomona | 05/31/2023 |
| 840-232 | Fontana | 06/09/2023 |
| 840-233 | Arrowhead | 07/13/2023 |
| 840-234 | Arrowhead | 4/18/2021 |
| 840-240 | Diamond Bar | 11/18/2022 |
| 840-252 | Mentone | 2/28/2022 |
| 840-300 | Redlands | 7/15/2021 |
| 840-333 | Pomona | 12/24/2020 |
| 840-336 | Colton | 2/18/2022 |
| 840-345 | Pomona | 7/7/2021 |
| 840-356 | Arrowhead | 2/18/2022 |
| 840-400 | Ontario | 1/4/2021 |
| 840-444 | Arrowhead | 12/24/2020 |
| 840-465 | Chino | 7/7/2021 |
| 840-466 | Upland | 2/18/2022 |
| 840-500 | Bigbear City | 1/27/2022 |
| 840-587 | San Bernardino | 2/23/2022 |
| 840-588 | Diamond Bar | 10/28/2021 |
| 840-600 | Colton | 1/4/2021 |
| 840-666 | Fontana | 12/24/2020 |
| 840-677 | Etiwanda | 10/28/2021 |
| 840-688 | Crestline | 10/25/2021 |
| 840-699 | Ontario | 7/16/2021 |
| 840-777 | Pomona | 12/23/2020 |
| 840-788 | Fontana | 7/16/2021 |
| 840-799 | Rialto | 7/15/2021 |
| 840-800 | Upland | 12/24/2020 |
| 840-804 | Claremont | 01/13/2023 |
| 840-837 | Pomona | 1/10/2022 |
| 840-877 | Marshall | 7/15/2021 |
| 840-888 | Redlands | 12/23/2020 |
| 840-899 | Highland | 7/15/2021 |
| 840-900 | Rialto | 12/24/2020 |
| 840-977 | Claremont | 7/15/2021 |
| 840-999 | Upland | 12/23/2020 |
| City1 | County | Time2 |
|---|---|---|
| Angelus Oaks | San Bernardino | P |
| Big Bear City | San Bernardino | P |
| Big Bear Lake | San Bernardino | P |
| Bloomington | San Bernardino | P |
| Blue Jay | San Bernardino | P |
| Bryn Mawr | San Bernardino | P |
| Calimesa | Riverside | P |
| Cedar Glen | San Bernardino | P |
| Cedarpines Park | San Bernardino | P |
| Chino | San Bernardino | P |
| Chino Hills | San Bernardino | P |
| Claremont | Los Angeles | P |
| Colton | San Bernardino | P |
| Crest Park | San Bernardino | P |
| Crestline | San Bernardino | P |
| Diamond Bar | Los Angeles | P |
| Fawnskin | San Bernardino | P |
| Fontana | San Bernardino | P |
| Forest Falls | San Bernardino | P |
| Green Valley Lake | San Bernardino | P |
| Guasti | San Bernardino | P |
| Highland | San Bernardino | P |
| La Verne | Los Angeles | P |
| Lake Arrowhead | San Bernardino | P |
| Loma Linda | San Bernardino | P |
| Lytle Creek | San Bernardino | P |
| Mentone | San Bernardino | P |
| Montclair | San Bernardino | P |
| Mount Baldy | Los Angeles | P |
| Ontario | San Bernardino | P |
| Patton | San Bernardino | P |
| Pomona | Los Angeles | P |
| Rancho Cucamonga | San Bernardino | P |
| Redlands | San Bernardino | P |
| Rialto | San Bernardino | P |
| Rimforest | San Bernardino | P |
| Running Springs | San Bernardino | P |
| San Bernardino | San Bernardino | P |
| San Dimas | Los Angeles | P |
| Skyforest | San Bernardino | P |
| Sugarloaf | San Bernardino | P |
| Twin Peaks | San Bernardino | P |
| Upland | San Bernardino | P |
| Walnut | Los Angeles | P |
| Yucaipa | San Bernardino | P |