| Start Date | 09/23/2008 |
| Current Time in Area Code 657 | 657> PST |
| Timezone | Pacific Standard Time |
| Regional Market Area | Metro Los Angeles |
| Population (2020) | 0 |
| Adjacent Area Codes | 562,626,714,840,909,949,951 |
| Overlay Area Codes | 714 |
| Anaheim |
| Brea |
| Buena Park |
| Costa Mesa |
| Cypress |
| Fountain Valley |
| Fullerton |
| Garden Grove |
| Huntington Beach |
| Orange |
| Placentia |
| Santa Ana |
| Stanton |
| Tustin |
| Westminster |
| Yorba Linda |