Starting on Sunday, Wisconsin residents will have to dial ten digits to make local calls. Right now, you can place a call to a number in the same area code without dialing the area code. No matter what area code you dial in the state, you will have to include the entire area code to connect on all calls. The change will be for landlines and cellphones in all six of Wisconsin's area codes. The ten-digit dialing is being implemented so that the national suicide hotline can be set up.  Wisconsin joins 36 other states that are required to switch to ten-digit dialing.