Significant events for area code 813
| Date |
Details |
| 1953 | Area code 305 was split with 813 covering the southwestern area of Florida. |
| March 1, 1996 | Area code 813 was split with 941 covering the south and east areas of 813. |
| February 1, 1999 | Area code 813 was split with 727 covering the western area of 813. |
| February 22, 2022 | Area code 813 was overlaid with 656 covering the western area of 813. |