Ohio has 15 active area codes as of 2026, covering the state through a mix of original 1947 assignments, geographic splits, and modern overlays. This guide walks through the full list, which regions each code serves, the order they came online, and where new codes are most likely to land next.
The Short Answer
Ohio currently has 15 active area codes in service. The count reflects a combination of population growth, the rise of mobile lines, and the way modern numbering allocates blocks — every line activated, whether a cellphone, a business desk line, a VoIP number, or a connected device, consumes a slot in the pool.
By population, Ohio ranks #7 nationally with roughly 11,883,304 residents as of the most recent estimates. That puts the state’s area code count in line with its population peers — denser, faster-growing states need more codes; smaller states need fewer.
The Full List of Ohio Area Codes
The active area codes serving Ohio are listed below, in numerical order. Where a code is an overlay or a split-off from an earlier code, that relationship is noted.
- 216 — Cleveland and inner Cuyahoga County
- 220 — Central and southeastern Ohio (Newark, Zanesville, Athens) (overlay of 740)
- 234 — Akron, Canton, Youngstown, Warren (overlay of 330)
- 283 — Southwest Ohio (Cincinnati) (overlay of 513)
- 326 — Southwest Ohio (Dayton, Springfield) (overlay of 937)
- 330 — Northeast Ohio (Akron, Canton, Youngstown, Warren)
- 380 — Columbus metro (overlay of 614)
- 419 — Northwest and north-central Ohio (Toledo, Sandusky, Ashland)
- 436 — Part of Greater Cleveland (Lorain, Mentor, Elyria) (overlay of 440)
- 440 — Outer Greater Cleveland (Lorain, Lake, Geauga counties)
- 513 — Southwest Ohio (Cincinnati, Hamilton, Middletown)
- 567 — Northwest and north-central Ohio (Toledo, Sandusky, Ashland) (overlay of 419)
- 614 — Columbus and Franklin County
- 740 — Central and southeastern Ohio outside Columbus (Newark, Zanesville, Athens)
- 937 — Southwest Ohio (Dayton, Springfield)
How Ohio’s Area Codes Grew Over Time
Ohio was assigned 4 area codes in the original 1947 NANP launch — 216, 419, 513, 614 — reflecting the state’s population and territorial size at the time. Subsequent splits and overlays have added codes as demand has grown.
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Browse Ohio Area Codes →- 1947 — Ohio was divided into four numbering plan areas at the launch of the North American Numbering Plan: 216 (northeast, including Cleveland), 419 (northwest, including Toledo), 513 (southwest, including Cincinnati), and 614 (southeast, including Columbus).
- 1996 — 330 split off from 216 on March 9, 1996 for the Akron, Canton, Youngstown, and Warren area, the state's first new area code since 1947.
- 1996 — 937 split off from 513 in September 1996 for the Dayton and Springfield area of southwest Ohio.
- 1997 — 440 split off from 216 on August 16, 1997 for the outer ring of Greater Cleveland, surrounding the city and its inner suburbs.
- 1997 — 740 split off from 614 for central and southeastern Ohio outside the Columbus core.
- 2000 — 234 added as an overlay of 330 in the Akron, Canton, Youngstown, and Warren region.
- 2002 — 567 added on January 1, 2002 as an overlay of 419 in northwest and north-central Ohio.
- 2015 — 220 added as an overlay of 740 in central and southeastern Ohio.
- 2016 — 380 added as an overlay of 614 in the Columbus metro.
- 2020 — 326 added in March 2020 as an overlay of 937 in the Dayton and Springfield area.
- 2023 — 283 became available to carriers on April 28, 2023 as an overlay of 513 in the Cincinnati region.
- 2024 — 436 added as an overlay of 440 in the outer Greater Cleveland area, Ohio's most recent area code.
Why Ohio Needs So Many Area Codes
A single area code can hold roughly 7.9 million possible phone numbers in theory — 792 valid central office codes (the second three digits) multiplied by 10,000 line numbers each. In practice the usable count is lower, because blocks of numbers are reserved, withheld, or assigned in bulk to carriers that may never fully use them. When the pool of available numbers in an area code falls below the threshold the North American Numbering Plan Administrator (NANPA) tracks, the state requests relief, and either a split or an overlay is approved.
Ohio’s population of roughly 11,883,304 residents would, on its own, fit comfortably inside a single area code’s capacity. The reason 15 codes are needed instead is that every adult typically carries at least one mobile line, many households have multiple lines per person, businesses concentrate phone numbers at extreme density, and connected devices, VoIP services, and second-line apps all draw from the same pool. The math compounds quickly.
Because Ohio sits in the top tier of states by code count, the relief pattern over the past two decades has been almost exclusively overlay-based. Overlays add a new code on top of the existing geography rather than splitting it, which means no existing customer has to change their number — the only adjustment is that all local calls become ten-digit. The trade-off is invisible to most users today, since contact lists handle dialing automatically.
Ohio Area Codes by Region
Cleveland and Cuyahoga County (216): Cleveland and its inner suburbs. 216 is one of Ohio's four original 1947 codes and now covers a smaller core after the 330 and 440 splits.
Outer Greater Cleveland (440, 436): Lorain, Elyria, Mentor, Lake and Geauga counties surrounding Cleveland. 440 split off from 216 in 1997; 436 overlay added in 2024.
Akron-Canton-Youngstown (330, 234): Akron, Canton, Youngstown, and Warren in northeast Ohio. 330 split off from 216 in 1996; 234 overlay added in 2000.
Northwest Ohio (419, 567): Toledo, Sandusky, Findlay, and Ashland. 419 is an original 1947 code; 567 overlay added in 2002. The pair kept the original boundaries because 419 was relieved by overlay rather than a split.
Columbus metro (614, 380): Columbus and Franklin County. 614 is an original 1947 code; 380 overlay added in 2016.
Central and southeastern Ohio (740, 220): Newark, Zanesville, Athens, and the surrounding region outside Columbus. 740 split off from 614 in 1997; 220 overlay added in 2015.
Cincinnati area (513, 283): Cincinnati, Hamilton, Middletown, and the rest of southwest Ohio's Hamilton County core. 513 is an original 1947 code; 283 overlay added in 2023.
Dayton and Springfield (937, 326): Dayton, Springfield, and the western part of southwest Ohio. 937 split off from 513 in 1996; 326 overlay added in 2020.
What’s Next for Ohio Area Codes
Ohio’s relief over the past decade has come entirely through overlays rather than splits, with the Public Utilities Commission of Ohio favoring the overlay approach in every case since the late 1990s. The most recent additions were 436 over 440 in 2024 and 283 over 513 in 2023, both of which extend the runway for their respective numbering plan areas. NANPA’s current NPA exhaust projections show no Ohio area code on the near-term relief schedule, with the fastest-growing pools in the Columbus (614/380) and Cleveland (216, 440/436) regions the most likely candidates for additional overlays later this decade.
Frequently Asked Questions
How many area codes does Ohio have right now?
Ohio has 15 active area codes in service across the territory it covers, including any overlays that share geography with an older code.
What is the oldest area code in Ohio?
216 is the oldest active area code in Ohio, assigned in 1947 when the North American Numbering Plan launched. It remains in service today, though its geographic footprint has typically been reduced by subsequent splits and overlays.
What is the newest area code in Ohio?
The most recent area code addition to Ohio was 436, activated in 2024. New phone lines provisioned in its service area are increasingly drawn from this code as older overlays approach exhaustion.
Why does Ohio need so many area codes?
Population growth combined with the proliferation of mobile lines, business direct-dial numbers, VoIP services, and connected devices has exhausted older codes faster than the original 1947 plan anticipated. Each new area code adds roughly 7.9 million additional phone numbers to the regional pool.
How many area codes does Ohio have?
Ohio has 15 active area codes as of 2026: the four originals from 1947 (216, 419, 513, 614), the splits that followed (330, 937, 440, 740), and the overlays added since (234, 567, 220, 380, 326, 283, 436). The newest is 436, added in 2024 over 440 in the Cleveland area.
Which area codes cover Cleveland?
The Cleveland area uses three codes. 216 covers the city and inner Cuyahoga County, while the outer ring is served by 440 with its 436 overlay, added in 2024. The Akron-Canton region just to the south uses 330 and 234.
Which area codes cover Columbus?
Columbus and Franklin County are served by 614, the original 1947 code, and its overlay 380, added in 2016. Both are considered Columbus numbers, and new lines may be assigned either one. The surrounding central and southeastern Ohio counties use 740 and 220.
Which area codes cover Cincinnati?
Cincinnati and the rest of Hamilton County use 513, an original 1947 code, with 283 added as an overlay in 2023. New phone numbers in the region may be assigned either code. The Dayton and Springfield area to the north uses 937 and 326.
Is 283 a real area code?
Yes. 283 is a valid Ohio area code that went into service on April 28, 2023 as an overlay of 513 in the Cincinnati region. It serves the same geographic area as 513, and existing 513 numbers were not changed when it was introduced.
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