Australian blocks that have been sub-divided (Turned into some form of Duplex) will often have an A and a B. So you will have 17A Station St. I also lived on

Australian blocks that have been sub-divided (Turned into some form of Duplex) will often have an A and a B. So you will have 17A Station St. I also lived on a street (~15 years ago -- without numbers. Small country town, the Postman knew who we were -- only 5 houses on the street)