| 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 |
|---|---|---|---|
| 406-312 | Bozeman | Gallatin | Landline |
| 406-939 | Glendive | Dawson | Wireless |
| 406-632 | Two Dot | Wheatland | Landline |
| 406-770 | Great Falls | Cascade | Wireless |
| 406-240 | Missoula | Missoula | Wireless |
| 406-556 | Bozeman | Gallatin | Landline |
| 406-457 | Helena | Lewis And Clark | Landline |
| 406-994 | Bozeman | Gallatin | Landline |
| 406-297 | Eureka | Lincoln | Landline |
| 406-467 | Fairfield | Teton | Landline |
| 406-479 | Butte | Silver Bow | Wireless |
| 406-203 | Missoula | Missoula | Landline |
| 406-798 | Lambert | Richland | Landline |
| 406-872 | Polson | Lake | Landline |
| 406-254 | Billings | Yellowstone | Landline |
| 406-867 | Billings | Yellowstone | Landline |
| 406-922 | Bozeman | Gallatin | Landline |
| 406-895 | Outlook | Sheridan | Landline |
| 406-272 | Billings | Yellowstone | Landline |
| 406-672 | Billings | Yellowstone | Wireless |