Frankfort City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 231 | US | Michigan - MI | Frankfort | Eastern | Details |
| 502 | US | Kentucky - KY | Frankfort | Eastern | Details |
| 708 | US | Illinois - IL | Frankfort | Central | Details |
| 740 | US | Ohio - OH | Frankfort | Eastern | Details |
| 765 | US | Indiana - IN | Frankfort | Eastern | Details |
| 779 | US | Illinois - IL | Frankfort | Central | Details |
| 785 | US | Kansas - KS | Frankfort | Central / Mountain | Details |
| 815 | US | Illinois - IL | Frankfort | Central | Details |