Monticello City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 207 | US | Maine - ME | Monticello | Eastern | Details |
| 217 | US | Illinois - IL | Monticello | Central | Details |
| 319 | US | Iowa - IA | Monticello | Central | Details |
| 336 | US | North Carolina - NC | Monticello | Eastern | Details |
| 435 | US | Utah - UT | Monticello | Mountain | Details |
| 573 | US | Missouri - MO | Monticello | Central | Details |
| 574 | US | Indiana - IN | Monticello | Eastern / Central | Details |
| 601 | US | Mississippi - MS | Monticello | Central | Details |
| 606 | US | Kentucky - KY | Monticello | Eastern / Central | Details |
| 608 | US | Wisconsin - WI | Monticello | Central | Details |
| 706 | US | Georgia - GA | Monticello | Eastern | Details |
| 762 | US | Georgia - GA | Monticello | Eastern | Details |
| 763 | US | Minnesota - MN | Monticello | Central | Details |
| 845 | US | New York - NY | Monticello | Eastern | Details |
| 850 | US | Florida - FL | Monticello | Eastern / Central | Details |
| 870 | US | Arkansas - AR | Monticello | Central | Details |
| 914 | US | New York - NY | Monticello | Eastern | Details |