Did anyone actually call up and checked if that is the solution? The base 36 thing was also the first thing that came to my mind, and after evaluating the number, I saw that the start is 8..., quickly checked the australian number codes and saw that sydney is indeed +61 02 8..., so for me there's a chance that's the solution. However, since it seemed kind of trivial to me, I thought maybe it's a prank of some sort...