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Miles City, MT is currently using only one area code which is area code 406. Area code 406 covers the entire state of
Montana, including Miles City, and was put into service on January 1, 1947. In addition to Miles City, MT area code 406 serves the larger communities of Billings, Bozeman, Butte, Great Falls, Helena,
Kalispell and Missoula. Miles City, MT does not utilize any area code overlays. |
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