Duncan Oklahoma Area Code

One area code covers Duncan: 580.

The code covering Duncan

Area codes covering Duncan, Oklahoma, with what each one primarily serves.
Area code	Primarily serves	In service
580	Lawton	1997

Scope the codes matched to Duncan. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot) and LocalCallingGuide NPA list (2026-07 NPA list). Updated 16 July 2026. Overlay relationships come from the numbering-plan authority; the place match is computed.

Which part of town has which code

Duncan has a single code, so there is nothing to divide — every local line carries 580.

ZIP codes for the same city

Postal geography is organised separately from telephone geography, so Duncan’s 3 ZIP codes do not map onto the codes above. They are listed in full, with the county each falls in, on the postal side of the site.

Duncan Oklahoma ZIP codes →

Nearby places with different codes

These are the closest places to Duncan whose area codes are not the same set. If you are near one of them, a local number may carry a code that is not on the list above.

The nearest places to Duncan covered by a different set of area codes.
City	Distance	Their area codes
Bradley Oklahoma area codes	31 mi	405, 572
Lindsay Oklahoma area codes	32 mi	405, 572
Alex Oklahoma area codes	32 mi	405, 572
Cement Oklahoma area codes	33 mi	405, 572
Ninnekah Oklahoma area codes	33 mi	405, 572
Chickasha Oklahoma area codes	39 mi	405, 572
Dibble Oklahoma area codes	42 mi	405, 572
Verden Oklahoma area codes	42 mi	405, 572

Straight-line distance between place reference points, not driving distance.