Are all 828 area code numbers local to each other?

North American area code +1 828 is the western tip of North Carolina, including Asheville. Not all places in area code 828 are local calls to one another. However, North Carolina has a feature called "toll alerting." That means that if you dial just the 7-digit number from a landline and it's not a local call, you will get a recording telling you to hang up and dial one plus the area code.