Louisiana Area Codes

Area codes: 6
ZIP codes: 719
Cities & towns: 479
Parishes: 64

Every area code in Louisiana

All Louisiana area codes, what each primarily serves, and which share ground with another.
Area code	Primarily serves	Shares ground with	In service
225	Baton Rouge	no overlay	1998
318	Shreveport	457	1957
337	Lafayette	no overlay	1999
457	Shreveport	318	2025
504	New Orleans	no overlay	1947
985	New Orleans	no overlay	2001

A code in the “shares ground” column is an overlay: it covers the same territory rather than a different part of Louisiana, which is why local calls there are dialled as ten digits.

Which codes share the same ground

Louisiana has 1 group of codes that overlay one another: the codes inside a group cover the same territory rather than different parts of the state, so local calls there are dialled as ten digits.

318 457

225, 337, 504 and 985 have no overlay: each is the only code serving its own territory.

Where Louisiana's communities sit

Each point is a Louisiana community, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Largest Louisiana cities and their codes

largest 25

Scope every area code assigned to Louisiana. Source LocalCallingGuide NPA list (2026-07 NPA list) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. Overlay relationships come from the numbering-plan authority; the city match is computed.