List of Louisiana area codes
The U.S. state of Louisiana is divided into five geographically distinct numbering plan areas in the North American Numbering Plan which are served by a total of six area codes, with one NPA being an overlay of two codes.
| Area code | Year created | Parent NPA | Overlay | Numbering plan area |
| 504 | 1947 | – | – | New Orleans area |
| 225 | 1998 | 504 | – | Baton Rouge area and parts of south central Louisiana |
| 318 | 1957 | 504 | 318/457 | northern Louisiana |
| 457 | 2025 | 318 | 318/457 | northern Louisiana |
| 337 | 1999 | 318 | – | southwestern Louisiana |
| 985 | 2001 | 504 | – | sections of southeast Louisiana which are not within the 504 area code |