The target population contains members of a group that a researcher is interested in studying. The results of the study are generalized to this population, because they all have significant traits in...
Area code 406. The map to the right is clickable; click on an area code to go to the page for that code. Coordinates: 47Â°00â²01â³N 109Â°45â²04â³W / 47.00028Â°N 109.75111Â°W / 47.00028; -109.75111 (State of Montana) Area code 406 is the telephone area code covering the entire state of Montana. It has been Montana's area code since area codes were created in 1947.
Area Codes. AreaCode.org is an area code directory with helpful information on the various United States area codes, area code listing, and other area code phone details. AreaCode.org also list international area codes within the North American Numbering Plan.elephone Area Code. The telephone area code is dialed before the local number. For area codes by city, search AreaCode.org. Area codes telephone differ from region to region, and in some places the area code must be dialed even when calling locally within that region.