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Fixed phone numbers in the United States, state Louisiana (area code 337) are comprised of a single country code (+1), a 3 digit area code, a 3 digit local office code (or region code), and a 4 digit line code. Making a call with the wrong country, area, or region code can be costly. Area Code 337 is located in Louisiana. It covers 72 cities, including Lafayette, Lake Charles, New Iberia, Sulphur, and Youngsville. It also covers 16 counties, including Lafayette Parish, Calcasieu Parish, Saint Landry Parish, Iberia Parish, and Vermilion Parish.
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