Louisiana Gazetteer
The 337 area code is used by SOME cities and towns in these Parishes:
| Acadia Parish | Cities & Towns | ZIP Codes | Features |
| Allen Parish | Cities & Towns | ZIP Codes | Features |
| Beauregard Parish | Cities & Towns | ZIP Codes | Features |
| Calcasieu Parish | Cities & Towns | ZIP Codes | Features |
| Cameron Parish | Cities & Towns | ZIP Codes | Features |
| Evangeline Parish | Cities & Towns | ZIP Codes | Features |
| Iberia Parish | Cities & Towns | ZIP Codes | Features |
| Jefferson Davis Parish | Cities & Towns | ZIP Codes | Features |
| Lafayette Parish | Cities & Towns | ZIP Codes | Features |
| Natchitoches Parish | Cities & Towns | ZIP Codes | Features |
| Saint Landry Parish | Cities & Towns | ZIP Codes | Features |
| Saint Martin Parish | Cities & Towns | ZIP Codes | Features |
| Saint Mary Parish | Cities & Towns | ZIP Codes | Features |
| Vermilion Parish | Cities & Towns | ZIP Codes | Features |
| Vernon Parish | Cities & Towns | ZIP Codes | Features |
