| Code,Created,Region | |
| 216,1947,Cleveland (October 1947) | |
| 220,2015,"Central and southeastern Ohio except Columbus, overlay with 740 (April 22, 2015)" | |
| 234,2000,"Akron, Canton, Youngstown, and Warren, overlay with 330 (October 30, 2000)" | |
| 326,2018,"Southwestern part of Ohio including Dayton, Marysville, Peebles, Springfield, public parts of Wright-Patterson Air Force Base, and areas north of Cincinnati, planned overlay with 937" | |
| 330,1996,"Akron, Canton, Youngstown, and Warren, overlay with 234 (March 9, 1996)" | |
| 380,2016,"Columbus, overlay with 614 (February 27, 2016)" | |
| 419,1947,"Northwest and north central Ohio including Toledo, Sandusky, and Ashland, overlay with 567 (October 1947)" | |
| 440,1997,"Part of Northeast Ohio including parts of Cleveland (August 16, 1997)" | |
| 513,1947,Southwest Ohio including Cincinnati (October 1947) | |
| 567,2002,"Northwest and north central Ohio including Toledo, Sandusky, and Ashland, overlay with 419 (January 1, 2002)" | |
| 614,1947,"Columbus, overlay with 380 (October 1947)" | |
| 740,1997,"Central and southeastern Ohio except Columbus, overlay with 220 (December 6, 1997)" | |
| 937,1996,"Southwestern part of Ohio including Dayton, Marysville, Peebles, Springfield, public parts of Wright-Patterson Air Force Base, and areas north of Cincinnati, planned overlay with 326 (September 28, 1996)" | |