| 406 Area Code Basic Information | |
|---|---|
| Area Code | 406 |
| Location | MT |
| Country | US |
| In Service Date | 1947-01-01 |
| Service Length | 79 years |
| Overlay Area Code? | No |
| Overlay Area Codes | |
| Parent Area Code | N/A |
| Time Zone | M |
| Map | |
| Area code in jeopardy? | No |
The following section explains how to dial outbound numbers from this area code.