| 303 Area Code Basic Information | |
|---|---|
| Area Code | 303 |
| Location | CO |
| Country | US |
| In Service Date | 1947-01-01 |
| Service Length | 79 years |
| Overlay Area Code? | Yes |
| Overlay Area Codes | 303 720 983 |
| Parent Area Code | N/A |
| Time Zone | M |
| Map | 563 |
| Area code in jeopardy? | No |
The following section explains how to dial outbound numbers from this area code.