Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/337

337 area code

Area code 337 is in Louisiana. It covers Lafayette, Lake Charles, New Iberia and 108 other places: 126 ZIP codes in Lafayette, Calcasieu, Acadia and 11 other parishes. Local time there is , Central Time. In service since 1999, with no overlay.

Time zone
Central
Largest city
Lafayette
Overlays
none
In service since
1999
Rate centres
75
Prefixes assigned
599 (5,990,000 numbers)

Who calls from a 337 number

NANPA records the carrier each block of 337 numbers is assigned to. Of the 5.5 million 337 numbers assigned, 35% are with cable, internet-calling, business and other carriers (Onvoy); 34% with mobile carriers (AT&T Mobility, T-Mobile and Verizon Wireless); 30% with local phone companies (AT&T and Brightspeed); 1% with paging companies.

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 337 numbers
CarrierKindShare
AT&TLandline21%
AT&T MobilityMobile19%
OnvoyCable, VoIP, other11%
T-MobileMobile9%
Verizon WirelessMobile6%
BrightspeedLandline5%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 337

The 68 places with a telephone rate centre of their own using 337, largest first. Each links to its ZIP codes.

Places in area code 337
PlaceZIP codesPopulation
Lafayette, LA 12 121,715
Lake Charles, LA 11 81,143
New Iberia, LA 3 27,571
Sulphur, LA 3 20,775
Youngsville, LA 1 17,427
Opelousas, LA 2 15,495
Broussard, LA 1 14,322
Carencro, LA 1 11,619
Crowley, LA 2 11,422
Abbeville, LA 2 11,003
Deridder, LA 1 9,763
Jennings, LA 1 9,553
Eunice, LA 1 9,239
Breaux Bridge, LA 1 7,501
Rayne, LA 1 7,105
Franklin, LA 1 6,461
Ville Platte, LA 1 6,253
Leesville, LA 2 5,495
St. Martinville, LA 1 5,297
Ragley, LA 1 5,254
Jeanerette, LA 1 4,655
Carlyss, LA — 4,412
Kaplan, LA 1 4,238
Church Point, LA 1 4,096
Welsh, LA 1 3,313
Iowa, LA 1 3,200
Vinton, LA 1 3,176
Sunset, LA 1 3,074
Dequincy, LA 1 2,931
Mamou, LA 1 2,864
Lake Arthur, LA 1 2,585
Delcambre, LA 1 2,552
Kinder, LA 1 2,317
Port Barre, LA 1 2,275
Baldwin, LA 1 1,962
Erath, LA 1 1,907
Oberlin, LA 1 1,809
Basile, LA 1 1,790
Henderson, LA — 1,779
Iota, LA 1 1,481
Gueydan, LA 1 1,464
Leonville, LA 1 1,395
Duson, LA 1 1,282
Arnaudville, LA 1 1,239
Lawtell, LA 1 1,171
Merryville, LA 1 1,004
Parks, LA — 963
Pine Prairie, LA 1 934
Hackberry, LA 1 899
Elton, LA 1 862
Loreauville, LA 1 833
Krotz Springs, LA 1 831
Hayes, LA 1 690
Centerville, LA 1 685
Melville, LA 1 589
Washington, LA 1 564
Cankton, LA — 514
Sugartown, LA 1 488
Roanoke, LA 1 482
Turkey Creek, LA 1 449
Chataignier, LA 1 367
Starks, LA 1 314
Reeves, LA 1 223
Lacassine, LA 1 218
Fenton, LA 1 207
Cameron, LA 1 169
Creole, LA 1 131
Grand Chenier, LA 1 87

Nearby places using 337

These places have no rate centre of their own in NANPA's records; the nearest one uses 337. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 337

126 ZIP codes in 97 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 337 numbers are issued

NANPA's rate centres with the most 337 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 337
Rate centrePlacePrefixes
LAFAYETTE Lafayette 130
LK CHARLES Lake Charles 80
NEW IBERIA New Iberia 28
LEESVILLE Leesville 22
OPELOUSAS Opelousas 21
ABBEVILLE Abbeville 18

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 337

Where is area code 337?

Area code 337 is in Louisiana. It covers Lafayette, Lake Charles, New Iberia and 108 other places: 126 ZIP codes in Lafayette, Calcasieu, Acadia and 11 other parishes.

What ZIP codes are in area code 337?

126 ZIP codes, by the town each is mailed to: Lafayette (12, 70501 to 70598), Lake Charles (11, 70601 to 70629), New Iberia (3, 70560 to 70563), Sulphur (3, 70663 to 70665) and 93 more towns. The full list is on this page.

What time zone is area code 337 in?

Central time.

Is a 337 number a mobile or a landline?

It can be either. 34% of 337 numbers are assigned to mobile carriers and 30% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

Does a 337 number mean the caller is in Louisiana?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 337 call can come from anywhere.

Other area codes in Louisiana

All 6 Louisiana area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 337.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/337

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