I got 3 calls from 905 378 2812 today.  Wow, it is so annoying.  I can hear some mumbling in the background, but cannot make out what is being said.
I just called the number from my land line.  It is a "strategic research" company doing surveys for their clients.  The voice mail provides you opportunity to enter your number and be removed from their call list.  I expect that if you do that they'll tag your number and sell it as an active number to some other crap company.
I'm just blocking the number.
Keep your head down.
D