The entire state of Montana is in area code 406, which is +1 406 in international format.
A 406 area code belongs to the state of Montana. Since 1947 this area code has been in service. This zip codes covers 56 counties and also 170 cities.
'00' isn't part of the country code, it is a commonly used international access prefix. Country code +1 is North America (USA, Canada, etc.), and +1 406 is the U.S. state of Montana.
The 307 area code serves the entire state of Wyoming - where the majority of Yellowstone is located. Note, however that Yellowstone National Park stretches a bit outside the boundaries of northwest Wyoming into Montana (area code 406) and Idaho (area code 208).
The area of Sarpsborg is 406 square kilometers.
The area of Murgul is 406 square kilometers.
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GEICO
The area of Jesús de Otoro is 406 square kilometers.
Ontario's deepest lake is Lake Superior, which reaches depths of up to 1,332 feet (406 meters). It is the largest and deepest of the Great Lakes in North America.