Claim to be from internet security, wont give name of company

This number called me claiming to be Telstra Technical Support. If this was the case they would know my name. The other telltale sign was their call centre was extremely noisy.

Received a call and this number showed up on my land-line hand set. Was some sort of call center as it was noisy; it was also difficult to understand the lady on the phone. Hung up and barred.