I get many calls from supposedly Bairnsdale in Victoria. When I answer they hang up. Always with the same prefix of (03) 4100 so these scammers must have bought a block of numbers. I block one and the same thing happens with slightly different numbers. Scammers I’d say

Yep. Same problem here. So annoying

Per previous comment, I receive several a day, always block them and always they try again with the last three digits changing

They havent bought numbers, they use number generators that spoof numbers with local area codes and format, most likely some street sh*tter con artist from Mumbai