The state of Mississippi is divided into three numbering plan areas, with a total of five area codes.
| Area code | Year created | Parent NPA | Overlay | Numbering plan area |
|---|---|---|---|---|
| 601 | 1947 | – | 601/769 | most of southern Mississippi including Jackson. |
| 769 | 2005 | 601 | ||
| 228 | 1997 | 601 | – | Gulf Coast region of Mississippi |
| 662 | 1999 | 601 | 471/662 | northern Mississippi |
| 471 | 2026 [1] | 662 |