Area Codes
| 337 | Louisiana (Leesville, Lake Charles, Lafayette, New Iberia, Opelousas, De Ridder and southwestern Louisiana), split from 318 on October 11, 1999) | More information at: Area Code 337 Phone Number Blocks
| 337 | Louisiana (Leesville, Lake Charles, Lafayette, New Iberia, Opelousas, De Ridder and southwestern Louisiana), split from 318 on October 11, 1999) | More information at: Area Code 337 Phone Number Blocks