Louisiana · Central Time
337 Area Code
Area code 337 is in Louisiana, serving southwest Louisiana and Acadiana, including Lafayette and Lake Charles. It is in the Central Time zone.
Last updated October 1, 2026 · Source: NANPA
Where is the 337 area code?
337 is a Louisiana area code covering southwest Louisiana and Acadiana, including Lafayette and Lake Charles. In the wider directory it sits in the South region.
Cities in the 337 area code
- Lafayette
- Lake Charles
- New Iberia
- Opelousas
- Sulphur
- Youngsville
- Crowley
- Broussard
- Abbeville
- Jennings
- Eunice
- Breaux Bridge
- DeRidder
- Ville Platte
Counties served by 337
Lafayette Parish, Calcasieu Parish, Iberia Parish, St. Landry Parish, Acadia Parish, Vermilion Parish, St. Martin Parish, Jefferson Davis Parish, Beauregard Parish and Evangeline Parish.
Dialing 337
Lafayette, LA is currently served by the single area code 337, with no overlay. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.
From outside the US, dial +1 337 followed by the seven-digit number.
History of the 337 area code
337 went into service on October 11, 1999, created when it was split from 318. It serves Lafayette and the surrounding part of Louisiana. For how codes are created, split, and overlaid, see how area codes work.
Is 337 a scam or spam risk?
337 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 337 number on your screen is no guarantee the caller is in Lafayette, LA or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Louisiana area codes
Explore more
See every code in Louisiana, compare codes across the South region, or view all Central Time codes. You can also browse the 3XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
337 area code FAQ
Where is the 337 area code?
The 337 area code is in Louisiana, covering southwest Louisiana and Acadiana, including Lafayette and Lake Charles, in the South region.
What cities are in the 337 area code?
Cities in the 337 area code include Lafayette, Lake Charles, New Iberia, Opelousas, Sulphur, Youngsville, Crowley, Broussard, Abbeville and Jennings.
What time zone is 337 in?
337 is in the Central Time zone.
When did the 337 area code start?
337 went into service on October 11, 1999.
Do I have to dial 10 digits for 337?
Ten-digit dialing always works, and many areas now require it; some local calls in this area may still connect with seven digits.
Is 337 a toll-free or premium code?
No. 337 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.