| 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 |
|---|---|---|---|
| 406-468 | Cascade | Cascade | Landline |
| 406-238 | Billings | Yellowstone | Landline |
| 406-660 | Dillon | Beaverhead | Wireless |
| 406-635 | Fallon | Prairie | Landline |
| 406-789 | Medicine Lake | Sheridan | Landline |
| 406-499 | Seeley Lake | Missoula | Wireless |
| 406-794 | Billings | Yellowstone | Landline |
| 406-495 | Helena | Lewis And Clark | Landline |
| 406-752 | Kalispell | Flathead | Landline |
| 406-688 | Scobey | Daniels | Wireless |
| 406-464 | Roy | Fergus | Landline |
| 406-998 | Yellowstone | Yellowstone | - |
| 406-444 | Helena | Lewis And Clark | Landline |
| 406-753 | Brady | Pondera | Landline |
| 406-915 | Wolf Point | Roosevelt | Wireless |
| 406-769 | Bainville | Roosevelt | Landline |
| 406-773 | Richey | Dawson | Landline |
| 406-818 | Red Lodge | Carbon | Wireless |
| 406-655 | Billings | Yellowstone | Landline |
| 406-779 | Flaxville | Daniels | Landline |