This number began to appear on my caller ID, beginning about a week ago. The display shows "Long Distance - Unavailable". They call several times per day, but never leave a message. I haven't been home to answer it, but I suspect that it's another one of those mortgage scams.
Hopefully, this kind of crap will end soon, as Canada is finally instituting a "Do Not Call" registry. It can't come soon enough, in my opinion!