Who called from 4162479291

No, they are not in Toronto.  They are probably calling from Pakistan and aren't bright enough to realize that local area codes do not generate a long distance ring.

Get called but no one speaks. Called back but this number is not in service.

blocked but I see it on my call display that they tried to call again

wonder whether it's from the same group of people because I also got calls from....
(416)237-9210
(416)292-4286
(416)454-2525
(416)698-0162
(416)756-9786
(416)757-3134
(416)757-6660
(647)259-8808
(647)493-8094
(905)237-9210
(905)237-9256
(905)756-9786
1-905-563-6112
1-905-988-4285

They call at least once per day and when answered they put the phone down or hang up! What can we do?