| General Information about Area Code 406 | |
|---|---|
| Country | United States |
| State / Province / Territory | Montana |
| Major City | Billings |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 406-709 | Lakeside | Flathead | Landline |
| 406-724 | Richland | Valley | Landline |
| 406-472 | Valier | Pondera | Landline |
| 406-722 | Alberton | Mineral | Landline |
| 406-726 | Arlee | Lake | Landline |
| 406-791 | Great Falls | Cascade | Landline |
| 406-869 | Billings | Yellowstone | Landline |
| 406-774 | Lambert | Richland | Landline |
| 406-263 | Glasgow | Valley | Landline |
| 406-278 | Conrad | Pondera | Landline |
| 406-385 | Westby | Sheridan | Landline |
| 406-302 | Canyon Creek | Lewis And Clark | Landline |
| 406-348 | Huntley | Yellowstone | Landline |
| 406-550 | Missoula | Missoula | Wireless |
| 406-314 | Kalispell | Flathead | Wireless |
| 406-225 | Boulder | Jefferson | Landline |
| 406-267 | Divide | Silver Bow | Landline |
| 406-359 | Glendive | Dawson | Landline |
| 406-732 | Browning | Glacier | Landline |
| 406-840 | Bearcreek | Carbon | Landline |