Area Code 406 Montana, USA

WhereCall is here to provide you with the most information on the area code 406, located in Montana, USA. This area code contains 714 prefixes and is not in jeopardy of exceeding the known supply of central office codes during the planning/implementation interval for relief.

NPA Information
Area Code (NPA)406
LocationMontana, USA
In Jeopardy?No
Is Assigned?Yes
Assignment Date01 Jan 1947
In Service?Yes
In Service Date01 Jan 1947
Predominant Timezone(s)UTC-07:00
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