List of Louisiana area codes

The U.S. state of Louisiana is divided into five geographically distinct numbering plan areas (NPAs) in the North American Numbering Plan (NANP) which are each served by one distinct area code.

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	1999	504	–	northern Louisiana
337	1999	318	–	southwestern Louisiana
985	2001	504	–	sections of southeast Louisiana which are not within the 504 area code

^[1]

References

1. https://www.lpsc.louisiana.gov/docs/press/318%20PR%20final.pdf ^{[ bare URL PDF ]}