Received the call, was suspicious from the start as it was OS and he said he was from Telstra. Mentioned that there were Nigerian Hackers getting into my computer, let him go on for a few minutes. Said they were even in my financial information. Asked him to identify who I was, said he had no details. I said that if he was from Telstra he would have all of my details. After arguing with me that he was not privy to this information in regards to privacy I told him that he was a scammer and hung up on him.

This is obviously dodgy - no such number.

20 March 2018
I have not bothered to try and ring back.
Let it ring now, when my answering machine switches on they hang up.

I Live in the Pilbara region of West Australia.
Get a few of these calls every couple of weeks, then nothing for a week or two and starts again.
Spam or rubbish call.

01 is the overseas code. 61 is the International code for Australia. You'll find that a lot of overseas spammer calls start with 0161 followed by 8 digits.

from technical service dept of telstra. (Indian accent) Told him he was a lying ba...rd. He hung up.

12 digit phone number it doesn’t exist. They phoned 14/2/2018

On answering call, received busy tone.

Hmmm... 123456789, that’s not a spoofed number at all. Telstra scammers.

Hmm... 123456789 not a spoofed number at all. Telstra scam artists.