Montana
| Area Code | Phone Number | City | State |
| 406 | 924-4008 | Belgrade | MT |
| 406 | 545-4126 | Billings | MT |
| 406 | 237-9876 | Billings | MT |
| 406 | 545-4450 | Billings | MT |
| 406 | 545-4071 | Billings | MT |
| 406 | 586-0459 | Bozeman | MT |
| 406 | 551-4450 | Bozeman | MT |
| 406 | 522-4727 | Bozeman | MT |
| 406 | 551-4119 | Bozeman | MT |
| 406 | 662-0228 | Bridger | MT |
| 406 | 662-0229 | Bridger | MT |
| 406 | 565-4099 | Butte | MT |
| 406 | 565-4450 | Butte | MT |
| 406 | 723-1606 | Butte | MT |
| 406 | 686-0126 | Clyde Park | MT |
| 406 | 748-7008 | Colstrip | MT |
| 406 | 322-2130 | Columbus | MT |
| 406 | 322-2129 | Columbus | MT |
| 406 | 838-0004 | Cooke City | MT |
| 406 | 873-8008 | Cut Bank | MT |
| 406 | 988-4008 | Dillon | MT |
| 406 | 668-0128 | Fromberg | MT |
| 406 | 668-0129 | Fromberg | MT |
| 406 | 763-0148 | Gallatin Gateway | MT |
| 406 | 848-0008 | Gardiner | MT |
| 406 | 365-1108 | Glendive | MT |
| 406 | 564-4106 | Great Falls | MT |
| 406 | 454-8017 | Great Falls | MT |
| 406 | 564-4450 | Great Falls | MT |
| 406 | 623-4004 | Hardin | MT |
| 406 | 623-4005 | Hardin | MT |
| 406 | 558-4107 | Helena | MT |
| 406 | 558-4450 | Helena | MT |
| 406 | 443-9595 | Helena | MT |
| 406 | 962-0150 | Joliet | MT |
| 406 | 962-0149 | Joliet | MT |
| 406 | 755-6767 | Kalispell | MT |
| 406 | 628-0134 | Laurel | MT |
| 406 | 628-0133 | Laurel | MT |
| 406 | 708-4004 | Lewistown | MT |
| 406 | 333-0131 | Livingston | MT |
| 406 | 282-0131 | Manhattan | MT |
| 406 | 233-6008 | Miles City | MT |
| 406 | 552-4117 | Missoula | MT |
| 406 | 541-6725 | Missoula | MT |
| 406 | 541-6605 | Missoula | MT |
| 406 | 552-4450 | Missoula | MT |
| 406 | 541-6700 | Missoula | MT |
| 406 | 445-0133 | Red Lodge | MT |
| 406 | 445-0134 | Red Lodge | MT |
| 406 | 434-6008 | Shelby | MT |
| 406 | 630-4009 | Sidney | MT |
| 406 | 285-2131 | Three Forks | MT |
| 406 | 646-2008 | West Yellowstone | MT |
| 406 | 578-0126 | Wilsall | MT |
