My wife and I have been receiving calls from this number at midday each day.  Both recently swapped to Optus so it seems indicate it might be them.

These f***ing maggots will be tracked down by me and be skinned alive!!! Scum of the f***ing earth!!! Harasing people like they do look out cold callers the first ring you will hear is me breaking your f***ing ear drums!!!!!!!

this c*** keeps calling me to

Yes, i have also received missed calls from this number.

I am unsure of who it may be, but the consensus seems to be that it may be optus.

Thank you for your tips.

I was getting call from (02) 8087 3088 until yesterday and today it is (02) 8083 0100.It is obviously spamming or scamming. I am not with optus or telstra so whoever it is is just cold calling to scam people. It is a real pain in the arse and they should be shut down

but im not with optus im with 3 and theyve been calling me too!