Jefferson City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 430 | US | Texas - TX | Jefferson | Central | Details |
| 440 | US | Ohio - OH | Jefferson | Eastern | Details |
| 515 | US | Iowa - IA | Jefferson | Central | Details |
| 541 | US | Oregon - OR | Jefferson | Mountain / Pacific | Details |
| 603 | US | New Hampshire - NH | Jefferson | Eastern | Details |
| 605 | US | South Dakota - SD | Jefferson | Central / Mountain | Details |
| 706 | US | Georgia - GA | Jefferson | Eastern | Details |
| 724 | US | Pennsylvania - PA | Jefferson | Eastern | Details |
| 843 | US | South Carolina - SC | Jefferson | Eastern | Details |
| 903 | US | Texas - TX | Jefferson | Central | Details |
| 920 | US | Wisconsin - WI | Jefferson | Central | Details |