There are a bunch of different 220V outlets still in use, and as someone else noted, sometimes a major appliance like a range or clothes dryer will be hard-wire

There are a bunch of different 220V outlets still in use, and as someone else noted, sometimes a major appliance like a range or clothes dryer will be hard-wired in. Edit: see https://www.askmediy.com/220-volt-plugs-receptacles-configurations/ https://www.askmediy.com/220-volt-plugs-receptacles-configur... (scroll down to the bottom for a look at the full spectrum)