Oklahoma Area Codes

Area codes: 5
ZIP codes: 765
Cities & towns: 582
Counties: 77

Every area code in Oklahoma

All Oklahoma area codes, what each primarily serves, and which share ground with another.
Area code	Primarily serves	Shares ground with	In service
405	Oklahoma City	572	1947
539	Tulsa	918	2011
572	Oklahoma City	405	2021
580	Lawton	no overlay	1997
918	Tulsa	539	1953

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

Which codes share the same ground

Oklahoma has 2 groups 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.

405 572
539 918

580 has no overlay: it is the only code serving its territory.

Where Oklahoma's communities sit

Each point is an Oklahoma 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 Oklahoma cities and their codes

largest 25

Scope every area code assigned to Oklahoma. 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.