The 337 area code is located in the state of Louisiana, and according to Intelius data, covers roughly 636,558 phone numbers and 911,348 listings across 610 prefixes.
This is a General Purpose Code, in service since October 11, 1999.
Area code 337 was split from area code 318.
Local calls within area code 337 require 10 digits dialing, while long-distance calls require 1 plus 10 digits dialing.
Have you received a call from a number with a 337 area code? Figure out who is calling you by performing a reverse phone lookup search. Intelius can provide you with a phone report that includes (when available) original line type and carrier, the number owner’s name, last known address and past addresses, age, possible relatives, and more.
| County Population (2025) | 257,949 |
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| County Population (2025) | 80,765 |
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| County Population (2025) | 279,108 |
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