The area code 337 is located in Lafayette, Louisiana.
Area code 337 serves Lafayette and much of southwestern Louisiana, a region widely known as Acadiana. Centered in Lafayette, Louisiana, it stretches along the I‑10 and I‑49 corridors between Baton Rouge and Lake Charles and down to the Gulf marshes. This area code was created after a split from 318. “Area code 337 was created on September 15, 1999, in a split from 318.” — North American Numbering Plan Administrator (NANPA)
It covers a mix of culture-rich cities and small towns, including:
The 337 region blends Cajun and Creole heritage with key landmarks and festivals. In Lafayette, look for the University of Louisiana at Lafayette, the Cajundome, and the living‑history village at Vermilionville. Near Lake Charles, the Creole Nature Trail showcases Gulf Coast wildlife and beaches. The Atchafalaya Basin sits to the east, adding bayous and swamp scenery to the mix.
For calls, +1 337 reaches southwestern Louisiana in the Central Time (CT) zone. The area code spans parishes such as Lafayette, Calcasieu, Iberia, Vermilion, St. Landry, Acadia, Jefferson Davis, Cameron, Evangeline, St. Martin, Allen, and Beauregard. The region is often called “Acadiana,” which the Louisiana Legislature officially recognized in 1971 as the state’s French Acadian heritage area. Local life here is famous for zydeco music, crawfish boils, and a strong sense of community—making 337 phone numbers a clear signal of Southwest Louisiana roots.