Where is 406 area code? 

406 – Montana

What area code is 406

Montana-the capital is Helena-is located in the northwest of the United States of America. The largest city in the state is Billings. Montana, often referred to as the Treasure State, has rich land resources, such as coal, copper, silver or Gold.

As a result, it is the second largest city in the United States and the second largest city in the United States. The Rocky Mountains extend over a length of about 5,000 kilometers, from Mexico to Canada and Alaska. The highest mountain of the fold mountains of the 6,194 meters high Mount McKinley in Alaska. Other U.S. states that belong to this Region are Wyoming, Colorado, New Mexico, Utah, Arizona, Nevada and Idaho.