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.
Western Washington will get a new telephone area code next year pending a vote of the state utilities commission. Idaho is rolling out a new area code as well. The new area code in western Washington will be 564. In Idaho the new area code will be 986. Population growth and the proliferation of mobile devices mean phone numbers for new customers are running out in Idaho's existing 208 dialing prefix and western Washington's 360.