Ohio Area Codes

Area codes: 15
ZIP codes: 1,416
Cities & towns: 1,063
Counties: 88

Every area code in Ohio

All Ohio area codes, what each primarily serves, and which share ground with another.
Area code	Primarily serves	Shares ground with	In service
216	Cleveland	no overlay	1947
220	Newark	740	2015
234	Akron	330	2000
283	Cincinnati	513	2023
326	Dayton	937	2020
330	Akron	234	1996
380	Columbus	614	2016
419	Toledo	567	1947
436	Cleveland	440	2024
440	Cleveland	436	1997
513	Cincinnati	283	1947
567	Toledo	419	2002
614	Columbus	380	1947
740	Newark	220	1997
937	Dayton	326	1996

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

Which codes share the same ground

Ohio has 7 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.

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

Where Ohio's communities sit

Each point is an Ohio 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 Ohio cities and their codes

largest 25

Scope every area code assigned to Ohio. 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.