door–to–door 
/ˌdoɚtəˈdoɚ/ adjective
always used before a noun /ˌdoɚtəˈdoɚ/ adjective : going or made by going to each house, apartment, or building in an area
▪ a door-to-door salesman ▪ a door-to-door survey — see also (from) door to door at door
▪ a door-to-door salesman ▪ a door-to-door survey — see also (from) door to door at door
