Find any 406- phone number in Montana
The 406 area code is the telephone numbering plan code designated for the state of Montana. It was introduced in 1947 as one of the original 86 area codes – which applied to the entire United States and its territories at the time – and was split from the more widely served 201 area code.
The 406 area code is part of the North American Numbering Plan (NANP). This plan is composed of a 3-digit area code and a 7-digit subscriber number. Not only does the NANP organize phone numbers for the USA and its territories, but it also serves 18 areas in Canada and 24 Caribbean nations. The goal of this system is to enable easier phone number exchange and assignment. As each area code has a specified geographic area, the 406 area code covers all of Montana, which encourages easy communication between goods, services and individuals in the state.