Sheridan City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 307 | US | Wyoming - WY | Sheridan | Mountain | Details |
| 317 | US | Indiana - IN | Sheridan | Eastern | Details |
| 406 | US | Montana - MT | Sheridan | Mountain | Details |
| 503 | US | Oregon - OR | Sheridan | Pacific | Details |
| 660 | US | Missouri - MO | Sheridan | Central | Details |
| 815 | US | Illinois - IL | Sheridan | Central | Details |
| 870 | US | Arkansas - AR | Sheridan | Central | Details |
| 971 | US | Oregon - OR | Sheridan | Pacific | Details |
| 989 | US | Michigan – MI | Sheridan | Eastern | Details |