My grandmother's house (in Australia) was assigned a house number (in the 70s?) but she refused to use it, continuing to give her address as the house name and insisting that we grandkids address letters to her by name. As far as I know they always arrived. There was no number on the house or letterbox. I went by a few months ago (somebody else lives there now) and there's a number on the letterbox.
My in-laws live in a village in Germany (a little south of the town in this article) with only two streets, referred to as "am Berge" and "im Dorf" (on the hill and in the village) and though the house numbers are not unified as in this article's case, there is no actual street sign -- but by "name" it's pretty obvious which is which.