| General Information about Area Code 720 | |
|---|---|
| Country | United States |
| State / Province / Territory | Colorado |
| Major City | Denver |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 720-551 | Denver | Denver | Wireless |
| 720-366 | Denver | Denver | Wireless |
| 720-258 | Denver | Denver | Landline |
| 720-537 | Denver | Denver | Landline |
| 720-864 | Longmont | Boulder | Landline |
| 720-545 | Denver | Denver | Landline |
| 720-800 | Henderson | Adams | Landline |
| 720-829 | Denver | Denver | Wireless |
| 720-722 | Denver | Denver | Landline |
| 720-874 | Denver | Denver | Landline |
| 720-265 | Brighton | Weld | Landline |
| 720-529 | Denver | Denver | Landline |
| 720-842 | Denver | Denver | Landline |
| 720-283 | Denver | Denver | Landline |
| 720-789 | Denver | Denver | Landline |
| 720-479 | Denver | Denver | Landline |
| 720-539 | Denver | Denver | Wireless |
| 720-565 | Denver | Denver | Landline |
| 720-239 | Denver | Denver | Landline |
| 720-221 | Denver | Denver | Landline |