There have been a series of phone calls from a about 6-7 unfamiliar numbers with NSW and Victorian prefixes. When the answer machine picks up they hang up. These are some of the numbers(02) 8524 5905,(02) 6331 4815,(02) 9402 5883,(03) 8579 1391,0466 984 206,(02) 8038 1097 and some called repeated times. I suspect scammers are using a computer and piggy backing on local numbers