Claims to be from Telstra re unwanted call register. Gives a Victorian code telephone number but says address is in North Sydney. Claimed an employer id number TE123568.

Supposedly from Telstra re unwanted call register including overseas

Did not answer and quickly rang out. Above indicates a Twlstra source, but I'm not even a Telstra customer, so why would they call me?

Offers an upgrade to Do-not-call register to ensure no unwanted overseas calls, at no cost. Asked (very insistently!) for the end date of my credit card, which I refused and denied any need for her to know; terminated the call.