The house I grew up in had three area codes. It never moved and inch but the population around it sure did. And as such, they ran out of phone numbers… Three times. Then we moved to Idaho and discovered that the ENTIRE state has ONE area code.
Idaho doesn’t even have enough people in it to be identified in this Wikipedia pie chart of populations. We seem to find ourselves somewhere in the “other” category on many charts. I think it was that way before we moved here but we’re finding that we fit in quite well among the odd-balls.