I just got a cal from this # (519) 570-4223 I answered and nobody said nothing.
Have had them  before too.

got a call ~1:15pm on a Saturday, no voice or fax noise. Call display shows (519) 570-4223

Called me when i was sleeping off a night shift. Around 10 am that is. I guess i must have answered. But i dont think anyone was there. Got 3 calls in around 30 mins this was the last one. One was a blocked number and the other was another 570 number. I was worried i had hung up on a potential boss. But good to see it doesnt look like it.

Got this today at noon.  Guy on the line asked if I was the person who used a computer in the house (yes) and informed me that my computer was "sending out infections".  Ha!  I assume I was to be asked for all sorts of personal information (including credit card or remote access to my computer) but I laughed, said "Not it's not - what a scam!", and hung up.Will be reported.

this number called me in the evening no message left no answer when i called back - very suspicous