Phoned the number. Recorded message states "Sorry we missed you, it was a fund raising call from an Australian Charity."
Obviously they are using an autodial system, that disconnects if it gets an answering machine, or a no answer. I'm going to start asking charities if they use this service, and tell them to take me off their calling lists if they are.

They call me even though I am on the DO NOT CALL register.

call from above (02) 8823 3042 , no message left

(02) 8823 3042 - No one there, just hangs up when answered.
Rings every day, over past 3 months.
Had to also bar from my mobile phone, as rings every day, immediately after ringing my landline.

keeps calling leaves no message fed up

Keep on ringing but will not leave Message over past few months
Pain in the butt

calling every hour, no message.  Up to 6 for the day

please stop calling me

Got a call from (02) 8823 3042, but no one at the other end.

They just hung up.

Hmmm....

Got a call from (02) 8823 3042, but no one at the other end. They just hung up. Hmmm....

caller left no message on my answering machine

This number calls every day at the same time; that is 9:30 am (Sydney time).  We never answer.  No message is ever left.  This has been happening for 2 weeks now.  I am contemplating placing a whistle on the phone receiver and blowing it as hard as I can when this number next rings.