Wiktionary
house number
n. 1 The single object or multiple objects attached to a building (or an object adjacent to it such as a mailbox or post) to display the street address assigned to that structure. 2 The street address numbers painted on a building (or an object such as a mailbox or post near the building), or painted on the curb of the street in front of the building.
Usage examples of "house number".
There was nothing on the outside but my house number and postal code, no return address, only a handwritten routing number in the left corner.
I'm getting sprung, and by tonight I'll be putting on the feedbag with a swell doll down at Ration House Number Seventy-nine.