| 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 |
|---|---|---|---|
| 720-346 | Denver | Denver | Landline |
| 720-388 | Aurora | Arapahoe | Wireless |
| 720-420 | Denver | Denver | Landline |
| 720-553 | Aurora | Adams | Landline |
| 720-351 | Denver | Denver | Wireless |
| 720-247 | Brighton | Weld | Landline |
| 720-297 | Denver | Denver | Wireless |
| 720-492 | Aurora | Adams | Wireless |
| 720-636 | Denver | Denver | Wireless |
| 720-554 | Denver | Denver | Landline |
| 720-275 | Denver | Denver | Wireless |
| 720-717 | Aurora | Adams | Wireless |
| 720-267 | Denver | Denver | Landline |
| 720-540 | Denver | Denver | Landline |
| 720-947 | Denver | Denver | Landline |
| 720-852 | Denver | Denver | Landline |
| 720-210 | Denver | Denver | Landline |
| 720-298 | Denver | Denver | Wireless |
| 720-295 | Denver | Denver | Landline |
| 720-578 | Denver | Denver | Landline |