| 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 |
|---|---|---|---|
| 720-739 | Denver | Denver | Landline |
| 720-336 | Keenesburg | Weld | Landline |
| 720-341 | Denver | Denver | Wireless |
| 720-434 | Denver | Denver | Wireless |
| 720-506 | Denver | Denver | Landline |
| 720-774 | Denver | Denver | Wireless |
| 720-949 | Denver | Denver | Landline |
| 720-324 | Aurora | Arapahoe | Landline |
| 720-878 | Denver | Jefferson | Landline |
| 720-585 | Denver | Denver | Wireless |
| 720-838 | Aurora | Arapahoe | Wireless |
| 720-501 | Denver | Denver | Wireless |
| 720-412 | Denver | Denver | Wireless |
| 720-535 | Denver | Denver | Landline |
| 720-514 | Denver | Denver | Landline |
| 720-522 | Lone Tree | Douglas | Landline |
| 720-988 | Aurora | Arapahoe | Wireless |
| 720-455 | Denver | Denver | Landline |
| 720-542 | Denver | Denver | Landline |
| 720-252 | Aurora | Arapahoe | Wireless |