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| City | Dialing Code | Area Code |
| Akron | +1 330 | 330 |
| Bowling Green | +1 567 | 567 |
| Canton | +1 330 | 330 |
| Cincinnati | +1 513 | 513 |
| Cleveland | +1 216 | 216 |
| Columbus | +1 614 | 614 |
| Dayton | +1 937 | 937 |
| Dublin | +1 614 | 614 |
| Elyria | +1 440 | 440 |
| Euclid | +1 216 | 216 |
| Findlay | +1 567 | 567 |
| Grove City | +1 614 | 614 |
| Hamilton | +1 905 | 905 |
| Lakewood | +1 303 | 303 |
| Lancaster | +1 661 | 661 |
| Lima | +1 567 | 567 |
| Lorain | +1 440 | 440 |
| Mansfield | +1 567 | 567 |
| Marion | +1 740 | 740 |
| Mason | +1 513 | 513 |
| Massillon | +1 330 | 330 |
| Mentor | +1 440 | 440 |
| Middletown | +1 513 | 513 |
| Newark | +1 973 | 973 |
| North Royalton | +1 440 | 440 |
| Reynoldsburg | +1 614 | 614 |
| Springfield | +1 417 | 417 |
| Strongsville | +1 440 | 440 |
| Toledo | +1 419 | 419 |
| Warren | +1 586 | 586 |
| Westerville | +1 614 | 614 |
| Youngstown | +1 330 | 330 |
