| 216 | Ohio (Cleveland area) |
| 234 | Ohio (Youngstown, Warren, Akron, Canton and northeastern Ohio, overlays with 330) |
| 283 | Ohio (Cincinnati, Middletown, Hamilton, Norwood, Lebanon and southwestern Ohio. Overlay of code 283 postponed. Currently 513.) |
| 330 | Ohio (Youngstown, Warren, Akron, Canton and northeastern Ohio, overlays with 234) |
| 380 | Ohio This Area code is scheduled to provide numbering relief to Area code 614 but no date has been assigned for this to go into effect. |
| 419 | Ohio (Toledo, Sylvania, Mansfield, Lima, Findlay,Bryan, Sandusky, Bowling Green and northwestern Ohio, overlays with 567) |
| 440 | Ohio (Cleveland suburbs, Elyria, Lorain, Oberlin, Wellington and north central Ohio) |
| 513 | Ohio (Cincinnati, Middletown, Hamilton, Norwood, Lebanon and southwestern Ohio. Planned overlay with 283 is postponed) |
| 567 | Ohio (Toledo, Mansfield, Lima, Findlay, Bryan, Sandusky and northwestern Ohio, overlays with 419) |
| 614 | Ohio (Columbus area) |
| 740 | Ohio (Jackson, Lancaster, Marietta, Marion, Cambridge, Zanesville, New Castle, Athens, and southeastern Ohio) |
| 937 | Ohio (Marysville, Springfield, Dayton, Hillsboro and southwestern Ohio excluding Cincinnati area) |
