Louisiana area codes

Codes in service in Louisiana

Louisiana has 6 geographic area codes in service: 225, 318, 337, 457, 504, 985. 504 is the oldest, dated 1947, and 457 the newest, dated 25 Sep 2025.1 All of Louisiana's codes are on Central time.

Area code	NANPA location	NPA in-service date	In-service overlay peers	Time zone	Local calls within the code
225	LA	17 Aug 1998	None listed	Central	7 digits
318	LA	1957	457	Central	10 digits
337	LA	11 Oct 1999	None listed	Central	10 digits
457	LA	25 Sep 2025	318	Central	10 digits
504	LA	1947	None listed	Central	10 digits
985	LA	12 Feb 2001	None listed	Central	7 digits

Scroll the table sideways to see every column. Sources: NANPA (14 October 2026 file).

History and overlays in Louisiana

Before 1960: 504 (1947), 318 (1957)
1990s: 225 (17 Aug 1998), 337 (11 Oct 1999)
2000s: 985 (12 Feb 2001)
2020s: 457 (25 Sep 2025)

Louisiana's in-service overlay group is 318/457.1

318/457: 318 (1957) was joined by 457 on 25 Sep 2025.

Dialing in Louisiana

Local calls within a single area code in Louisiana differ: 7 digits for 225, 985; 10 digits for 318, 337, 457, 504. From any of Louisiana's codes, local calls to another area code are all recorded as 10 digits.1 Seven-digit local dialing is still recorded for 225, 985.

Neighbours of Louisiana

Regions that border Louisiana:

Arkansas: 4 codes (327, 479, 501, 870)
Mississippi: 5 codes (228, 471, 601, 662, ...)
Texas: 29 codes (210, 214, 254, 281, ...)

Rules that apply to every region are on the area-code reference.

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Sources

Every regulatory and pricing claim on this page links to the primary source it came from. Figures were checked on the date shown at the top of the page; rules and prices change, so verify before relying on one.

NANPA, NPA Database CSV, file dated 14 October 2026; US geographic codes, location, dates, overlay complexes, dialing plan and time zone. Retrieved 14 Oct 2026
https://reports.nanpa.com/public/npa_report.csv