There are several reports in the Google Maps Help forums that all of a sudden, the house numbers listed on Google Maps are now gone. This seems to only affect some countries, not the U.S. and others but countries like Austria, Germany, New Zealand and many others.
Yes, Google updated the maps internationally a while ago, but the house numbers were there. Now, they are gone.
Daniel from Google replied saying:
Thanks for reporting this. We are currently working on finding the root cause of the issue. I'll be back here later in the week to report any updates.
Some Google Maps users are pretty upset, saying:
If they are gone forever, it'll change my working life profoundly, for the worse.
Yea, it is only a bug - it appears.
Forum discussion at Google Maps Help.