Who called from 4344736173

Started getting calls from several numbers last night starting 6:30am PT .. continued every half hour to one hour from multiple locations -- Sheldon IA, Lynchburg, VA, Herer City Utah .. 12 calls in all. All bogus, all similar to this

I picked up, said hello, and there was no response... just a faint clicking sound. I am on a do-not-call list in Canada (although this seems to mean nothing to telemarketers in the US).

This number keeps calling with no response.

4th mysterious call today. they are using different numbers on me but probable same thing, no answer on other end. Wonder what is up with that.

called our office line at 2:30 am (EST). No voice on their end, but it sounded like someone was on the other end while the call lasted - for TWELVE SECONDS!