| City | Area Code | Dialing Code |
|---|---|---|
| Akron | 234 | +1 234 |
| Akron | 330 | +1 330 |
| Alliance | 234 | +1 234 |
| Alliance | 330 | +1 330 |
| Ashland | 419 | +1 419 |
| Ashland | 567 | +1 567 |
| Ashtabula | 440 | +1 440 |
| Athens | 220 | +1 220 |
| Athens | 740 | +1 740 |
| Austintown | 234 | +1 234 |
| Austintown | 330 | +1 330 |
| Barberton | 234 | +1 234 |
| Barberton | 330 | +1 330 |
| Beavercreek | 937 | +1 937 |
| Boardman | 234 | +1 234 |
| Boardman | 330 | +1 330 |
| Bowling Green | 419 | +1 419 |
| Bowling Green | 567 | +1 567 |
| Brook Park | 216 | +1 216 |
| Brunswick | 234 | +1 234 |
| Brunswick | 330 | +1 330 |
| Centerville | 937 | +1 937 |
| Chillicothe | 220 | +1 220 |
| Chillicothe | 740 | +1 740 |
| Cincinnati | 513 | +1 513 |
| Cleveland Heights | 216 | +1 216 |
| Columbus | 614 | +1 614 |
| Cuyahoga Falls | 234 | +1 234 |
| Cuyahoga Falls | 330 | +1 330 |
| Dayton | 937 | +1 937 |
| Delaware | 220 | +1 220 |
| Delaware | 740 | +1 740 |
| Dublin | 614 | +1 614 |
| East Cleveland | 216 | +1 216 |
| East Cleveland | 216 | +1 216 |
| Eastlake | 440 | +1 440 |
| Elyria | 440 | +1 440 |
| Fairborn | 937 | +1 937 |
| Fairfield | 513 | +1 513 |
| Findlay | 419 | +1 419 |
| Findlay | 567 | +1 567 |
| Gahanna | 614 | +1 614 |
| Garfield Heights | 216 | +1 216 |
| Green | 234 | +1 234 |
| Green | 330 | +1 330 |
| Grove City | 614 | +1 614 |
| Hamilton | 513 | +1 513 |
| Hilliard | 614 | +1 614 |
| Huber Heights | 937 | +1 937 |
| Hudson | 234 | +1 234 |
| Hudson | 330 | +1 330 |
| Kent | 234 | +1 234 |
| Kent | 330 | +1 330 |
| Kettering | 937 | +1 937 |
| Lakewood | 216 | +1 216 |
| Lancaster | 220 | +1 220 |
| Lancaster | 740 | +1 740 |
| Lima | 419 | +1 419 |
| Lima | 567 | +1 567 |
| Lorain | 440 | +1 440 |
| Mansfield | 419 | +1 419 |
| Mansfield | 567 | +1 567 |
| Maple Heights | 216 | +1 216 |
| Marion | 220 | +1 220 |
| Marion | 740 | +1 740 |
| Mason | 513 | +1 513 |
| Massillon | 234 | +1 234 |
| Massillon | 330 | +1 330 |
| Medina | 234 | +1 234 |
| Medina | 330 | +1 330 |
| Mentor | 440 | +1 440 |
| Middletown | 513 | +1 513 |
| Newark | 220 | +1 220 |
| Newark | 740 | +1 740 |
| Niles | 234 | +1 234 |
| Niles | 330 | +1 330 |
| North Canton | 234 | +1 234 |
| North Canton | 330 | +1 330 |
| North Olmsted | 440 | +1 440 |
| North Ridgeville | 440 | +1 440 |
| North Royalton | 440 | +1 440 |
| Norwood | 513 | +1 513 |
| Oxford | 513 | +1 513 |
| Parma | 216 | +1 216 |
| Parma | 440 | +1 440 |
| Parma Heights | 440 | +1 440 |
| Piqua | 937 | +1 937 |
| Portsmouth | 220 | +1 220 |
| Portsmouth | 740 | +1 740 |
| Reynoldsburg | 614 | +1 614 |
| Riverside | 937 | +1 937 |
| Rocky River | 440 | +1 440 |
| Sandusky | 419 | +1 419 |
| Sandusky | 567 | +1 567 |
| Shaker Heights | 216 | +1 216 |
| Sidney | 937 | +1 937 |
| Solon | 440 | +1 440 |
| South Euclid | 216 | +1 216 |
| South Euclid | 216 | +1 216 |
| Springfield | 937 | +1 937 |
| Stow | 234 | +1 234 |
| Stow | 330 | +1 330 |
| Strongsville | 440 | +1 440 |
| Toledo | 419 | +1 419 |
| Toledo | 567 | +1 567 |
| Trotwood | 937 | +1 937 |
| Troy | 937 | +1 937 |
| Upper Arlington | 614 | +1 614 |
| Warren | 234 | +1 234 |
| Warren | 330 | +1 330 |
| Westerville | 614 | +1 614 |
| Westlake | 440 | +1 440 |
| Willoughby | 440 | +1 440 |
| Wooster | 234 | +1 234 |
| Wooster | 330 | +1 330 |
| Xenia | 937 | +1 937 |
| Youngstown | 234 | +1 234 |
| Youngstown | 330 | +1 330 |
| Zanesville | 220 | +1 220 |
| Zanesville | 740 | +1 740 |