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