I called back number 0435 075 514 reached voice mail but did not say for what company.
Anonymous on (02) 8364 6160
They were following up about my account with them.
Anonymous on (02) 9794 5167
Automatic voice saying this is Telstra your internet will be shut down please push 1 to speak to...
Anonymous on (02) 8364 5188
Never leaves a message or won't say who they are but want your information first.
Anonymous on (02) 5104 9788
Dont know if its safe
Anonymous on 0430 908 202
Recorded message vaguely threatening legal action, doesn't seem legit