No answer when calling back, though they rang twice within a minute.

Experienced the same issue as Dan - missed a call from that number. called them back, they pick up and say nothing and put the line on hold and you can hear the line picking up again and being put on hold again.

That narrows it down a bit, then.

who is this?

missed a call from that number. called them back, they pick up and say nothing and put the line on hold and you can hear the line picking up again and being put on hold again.

I think it could be a man....or a woman!

I received a call from that number (02) 9923 1643 yesterday. They asked for my husband by his full name but the man wouldn't tell me what it was about, he was polite but said not to worry & hung up. My hubby doesn't know them. It was my mobile that it came thru to not his.???