State directory / Louisiana
US number directory / Louisiana
Louisiana
area codes
NANPA records 6 active geographic area codes for Louisiana, including 504 from 1947.
6geographic area codes
in this reference
in this reference
Earliest listed504 · 1947
Standard timeCT
Overlays in this stateYes — see code notes
Major city starting points
Baton Rouge (capital): 225; New Orleans (largest city in state reference): 504.
| City | Reference role | Codes to check |
|---|---|---|
| Baton Rouge | Capital | 225 |
| New Orleans | Largest city in state reference | 504 |
City reference · 2026-10-25
Codes, cities & coverage
Louisiana's active territorial overlay complexes are 318/457.
| Code | Region / major cities named in the reference | Introduced | Active overlay complexes |
|---|---|---|---|
| 225 | East-central Louisiana ( Baton Rouge ) | 17-Aug-1998 | None active in NANPA snapshot |
| 318 | Louisiana ( Shreveport–Bossier City , Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) | 01-Jan-1957 | 318/457 |
| 337 | Louisiana (Lafayette, Lake Charles , Leesville, New Iberia, Opelousas, and most of southwestern Louisiana) | 11-Oct-1999 | None active in NANPA snapshot |
| 457 | Louisiana ( Shreveport–Bossier City , Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) | 25-Sep-2025 | 318/457 |
| 504 | Louisiana ( New Orleans metropolitan area) | 01-Jan-1947 | None active in NANPA snapshot |
| 985 | Louisiana ( Houma , Slidell , and southeastern Louisiana excluding New Orleans ) | 12-Feb-2001 | None active in NANPA snapshot |
NANPA dates & overlays · 2026-10-25
Wikipedia geography · 2026-10-25 · CC BY-SA 4.0
Time zones
Louisiana spans 1 standard-time offset in the state reference: CT.
| Standard offset | Region | Daylight saving |
|---|---|---|
| UTC−06:00 CT | Central | Yes |