| 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 |
|---|---|---|---|
| 406-230 | Glasgow | Valley | Wireless |
| 406-628 | Laurel | Yellowstone | Landline |
| 406-274 | Missoula | Missoula | Landline |
| 406-573 | Browning | Glacier | Wireless |
| 406-812 | Laurel | Yellowstone | Landline |
| 406-356 | Forsyth | Rosebud | Landline |
| 406-521 | Townsend | Broadwater | Wireless |
| 406-566 | Stanford | Judith Basin | Landline |
| 406-246 | Dixon | Sanders | Landline |
| 406-346 | Forsyth | Rosebud | Landline |
| 406-676 | Ronan | Lake | Landline |
| 406-380 | Lewistown | Fergus | Wireless |
| 406-330 | Clinton | Missoula | Landline |
| 406-746 | Fort Peck | Valley | Landline |
| 406-524 | Glasgow | Valley | Landline |
| 406-205 | Great Falls | Cascade | Landline |
| 406-742 | Sidney | Richland | Landline |
| 406-460 | Shelby | Toole | Wireless |
| 406-987 | Glendive | Dawson | Wireless |
| 406-641 | West Yellowstone | Gallatin | Wireless |