337 Area Code — Louisiana
337 is a North American Numbering Plan area code for Louisiana, the United States. It covers about 940,790 people in 97 towns and 126 ZIP codes, including Lafayette, Lake Charles and New Iberia.
| Field | Value |
|---|---|
| Area code | 337 |
| Country | United States (+1) |
| State / province | Louisiana |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Central |
| Population covered | 940,790 |
| Towns covered | 97 |
| ZIP codes | 126 |
| Approx. centre | 30.319, -92.521 |
Where area code 337 is used
Area code 337 is assigned to Louisiana, the United States, inside the North American Numbering Plan. Numbers in the code are written (337) NXX-XXXX at home and +1 337 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 337
The 97 towns below are the largest in the 337 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Lafayette | Lafayette Parish | 158,114 | 12 |
| Lake Charles | Calcasieu Parish | 133,895 | 11 |
| New Iberia | Iberia Parish | 57,161 | 3 |
| Sulphur | Calcasieu Parish | 41,021 | 3 |
| Opelousas | St. Landry Parish | 37,565 | 2 |
| Youngsville | Lafayette Parish | 32,167 | 1 |
| Breaux Bridge | St. Martin Parish | 26,024 | 1 |
| Deridder | Beauregard Parish | 25,194 | 1 |
| Abbeville | Vermilion Parish | 24,107 | 2 |
| Leesville | Vernon Parish | 21,275 | 2 |
| Carencro | Lafayette Parish | 20,390 | 1 |
| Ville Platte | Evangeline Parish | 19,320 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Calcasieu Parish | 20 |
| Lafayette Parish | 18 |
| St. Landry Parish | 13 |
| Acadia Parish | 13 |
| Iberia Parish | 8 |
| Vernon Parish | 8 |
| Vermilion Parish | 7 |
| Jefferson Davis Parish | 7 |
| Evangeline Parish | 6 |
| Beauregard Parish | 6 |
| Allen Parish | 6 |
| St. Mary Parish | 5 |
Nearby area codes
How to dial area code 337
- Within North America: 337 + 7-digit number (337-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 337, then the 7-digit number — for example 00 1 337 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 337?
337 is a North American Numbering Plan area code assigned to Louisiana, the United States. It covers about 940,790 people in 97 towns.
Is 337 a US or Canadian area code?
337 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 337 in?
Area code 337 is in the Central time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.