| General Information about Area Code 303 | |
|---|---|
| Country | United States |
| State / Province / Territory | Colorado |
| Major City | Denver |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 303-744 | Denver | Denver | Landline |
| 303-379 | Denver | Denver | Landline |
| 303-703 | Denver | Denver | Landline |
| 303-364 | Denver | Denver | Landline |
| 303-530 | Denver | Denver | Landline |
| 303-925 | Denver | Denver | Landline |
| 303-947 | Denver | Denver | Wireless |
| 303-508 | Denver | Denver | Wireless |
| 303-428 | Denver | Denver | Landline |
| 303-601 | Denver | Denver | Wireless |
| 303-260 | Denver | Denver | Landline |
| 303-592 | Denver | Denver | Landline |
| 303-698 | Denver | Denver | Landline |
| 303-671 | Denver | Denver | Landline |
| 303-981 | Denver | Denver | Wireless |
| 303-557 | Denver | Denver | Landline |
| 303-851 | Denver | Denver | Wireless |
| 303-687 | Denver | Denver | Wireless |
| 303-445 | Denver | Jefferson | Landline |
| 303-708 | Denver | Denver | Landline |