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Where is the 337 Area Code?
The 337 area code is located in Louisiana, United States, covering the southwestern part of the state. It serves major cities and communities across this region, providing local phone numbers for residents and businesses.
Key Locations within the 337 Area Code:
- Major Cities & Communities: Lafayette, Lake Charles, New Iberia, Sulphur, Opelousas, Crowley, Abbeville, Moss Bluff, DeRidder, Eunice, Jennings, Fort Polk South, Scott, Broussard, Breaux Bridge
- Parishes (Partial or Complete Coverage): Lafayette, Calcasieu, St. Landry, Iberia, Acadia, Vermilion, St. Mary, Vernon, St. Martin, Beauregard, Jefferson Davis, Evangeline, Allen, Cameron

Time Zone
The 337 area code, covering cities in southwestern Louisiana, is entirely within the Central Time Zone (CT). The region observes Central Standard Time (CST, UTC−6) during the winter months and switches to Central Daylight Time (CDT, UTC−5) for daylight saving time in the summer, ensuring consistent local time for residents and businesses throughout the year.
About the 337 Area Code in Louisiana
The 337 area code was officially launched in 1999 as a split from the 318 region to support the growing demand for telecommunications across Southwestern Louisiana. It covers key urban and industrial centers like Lafayette, which play an important role in Louisiana’s broader economy through strong contributions to energy production, maritime activities, healthcare, and the state’s cultural heritage.
Lafayette Parish alone generates an estimated GDP of around $19.78 billion in 2024, making it one of the key economic centers within the 337 area and a significant contributor to Louisiana’s total output of over $300 billion, driven by diverse sectors across the state.
Key Economic Sectors in the 337 Region:
- Energy & Petrochemicals: Cheniere Energy, Halliburton, Schlumberger, Baker Hughes
- Healthcare: Ochsner Lafayette General, Our Lady of Lourdes Regional Medical Center, Lake Charles Memorial Health System, CHRISTUS Ochsner Health
- Education: University of Louisiana at Lafayette, McNeese State University, South Louisiana Community College, SOWELA Technical Community College
- Agribusiness & Food Production: McIlhenny Company (TABASCO®), Supreme Rice, Guidry’s Catfish
History of the 337 Area Code
The 337 area code was introduced in 1999 as a split from the 318 area code under the North American Numbering Plan (NANP) to meet the growing demand for telephone numbers in southwestern Louisiana. The split created a separate geographic region to improve the number allocation efficiency. It serves cities such as Lafayette, Lake Charles, and New Iberia, and remains a non-overlay area code, meaning the entire region is covered by a single area code (337) without any additional overlapping area codes.
Search Virtual Numbers with 337 Area Code
Find the perfect virtual numbers with a 337 area code for your business. Pick from our broad collection, each offering your business direct access to the thriving Lafayette market.
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337 Area Code: Dialing Format, Prefixes & Network Coverage
The 337 area code serves Southwest Louisiana and requires 10-digit dialing for all local calls, meaning callers must dial the area code followed by the seven-digit phone number (e.g., 337-XXX-XXXX). For long-distance calls within the U.S., dialing begins with 1 followed by the full 10-digit number.
A combination of landline, wireless, and VoIP providers operates within the 337 network. Major carriers such as AT&T (formerly BellSouth), Verizon, and T-Mobile provide coverage across the region. The area code includes a wide range of prefixes assigned across different rate centers and service providers throughout southwestern Louisiana, including examples such as 216, 232, and 237, among many others.
In addition to traditional telecom services, the 337 area code is fully compatible with modern VoIP systems, allowing businesses to establish a local presence through virtual numbers. These services support features like call forwarding, IVR systems, and automated reception, helping streamline communication without requiring a physical office.

Nearby Area Code
Key Features of a 337 Area Code Virtual Phone Number
How to Get a 337 Area Code Virtual Phone Number?
Calilio makes it easy to set up a 337 area code virtual phone number, which helps to establish a local presence in Lafayette and across Southwest Louisiana. Follow the simple steps below to get started.
Create an account on Calilio and log in to your dashboard.
Click the plus (+) icon next to the Number section in the left sidebar.
Go to the “My Number” page and select the United States as the country to browse 337 area code numbers.
Choose your preferred number type and select capabilities such as SMS, Voice, or MMS.
Browse the available numbers, select one, and click “Add to Cart.”
Enter your details and confirm the purchase to complete payment.
Already Have a Local Phone Number with 337 Area Code?
Switch Calilio without changing your 337 area code number. Upgrade your business communication in Lafayette while maintaining your established identity.

Benefits of a 337 Area Code for Businesses
Flaunting the United States phone number with the 337 area code for business enhances business communication in the Lafayette region.
Flexibility and Mobility
Enhanced Customer Engagement
Improved Marketing Efforts
Data Insights
Local Market Identity
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Frequently Asked Questions
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