Who called from 6475574953

Got a call today, did not answer, no message.  Vancouver.

This number called Vancouver at 9:16 am.  No one was there when I answered.  Silence, I waited, then I heard them hang up.

This entity calls using this number and a several other similar numbers. I'm looking for a way to block them. When I hear the first robo-word "Congratulations", I hang up

Keeps calling -- mornings, evenings.  I do not answer.  Can't someone put a stop to this invasion of privacy and annoyance?

Just got a call from 647-557-4953.  Didn't get to it in time.  Glad of that.  I thought, as Canadians, we could block these annoying calls.  How?