Morristown City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 201 | US | New Jersey - NJ | Morristown | Eastern | Details |
| 315 | US | New York - NY | Morristown | Eastern | Details |
| 423 | US | Tennessee - TN | Morristown | Eastern / Central | Details |
| 507 | US | Minnesota - MN | Morristown | Central | Details |
| 605 | US | South Dakota - SD | Morristown | Central / Mountain | Details |
| 765 | US | Indiana - IN | Morristown | Eastern | Details |
| 862 | US | New Jersey - NJ | Morristown | Eastern | Details |
| 865 | US | Tennessee - TN | Morristown | Eastern | Details |
| 973 | US | New Jersey - NJ | Morristown | Eastern | Details |