| 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 |
|---|---|---|---|
| 303-295 | Denver | Denver | Landline |
| 303-790 | Denver | Denver | Landline |
| 303-372 | Denver | Denver | Landline |
| 303-626 | Denver | Denver | Landline |
| 303-212 | Denver | Denver | Wireless |
| 303-355 | Denver | Denver | Landline |
| 303-249 | Denver | Denver | Wireless |
| 303-380 | Denver | Denver | Landline |
| 303-280 | Denver | Adams | Landline |
| 303-453 | Denver | Adams | Landline |
| 303-627 | Denver | Denver | Landline |
| 303-596 | Aurora | Arapahoe | Wireless |
| 303-577 | Denver | Denver | Landline |
| 303-513 | Denver | Denver | Wireless |
| 303-714 | Denver | Denver | Landline |
| 303-354 | Denver | Denver | Landline |
| 303-712 | Denver | Denver | Landline |
| 303-604 | Denver | Denver | Landline |
| 303-608 | Denver | Denver | Landline |
| 303-332 | Denver | Denver | Wireless |