Significant events for area code 323
| Date |
Details |
| June 13, 1998 | Area code 213 was split, with area code 323 becoming a "doughnut" around 213 (central Los Angeles) |
| July 8, 2017 | The 1998 split is erased, effectively making 213 and 323 overlays to each other. The reason: 323 has run out of numbers while 213 has an excess of numbers |