The area code 406 is located in Billings, Montana.
Area code 406 serves the beautiful state of Montana, covering diverse landscapes from the Rocky Mountains to vast plains. This area includes major cities like:
Established in 1947, this area code is unique as it encompasses the entire state, making it one of the largest area codes in the U.S. Notably, Montana is home to Glacier National Park, a stunning destination that draws hikers and nature lovers alike. With a population that enjoys both rugged wilderness and charming communities, area code 406 is a vital part of Montana's rich identity.