| Area Code | 909 |
| State | California |
| Current Time in Area Code 909 | 909> PDT |
| Timezone | Pacific Daylight Time |
| Population (2020) | 0 |
| Adjacent Area Codes | 442,626,657,661,714,760,840,951 |
| Overlay Area Codes | 840 |
| Chino |
| Chino Hills |
| Claremont |
| Colton |
| Diamond Bar |
| Fontana |
| Highland |
| La Verne |
| Montclair |
| Ontario |
| Pomona |
| Rancho Cucamonga |
| Redlands |
| Rialto |
| San Bernardino |
| San Dimas |
| Upland |
| Yucaipa |