Just received a call this morning from this number.  I do NOT answer any calls where the ID is "Blocked", "Unknown", "Unavailable", Anonymous" or "Out Of Area" or I don't recognize the caller ID.  The caller ID on this call was "OTTAWA   ON", no name and then the number.  Since we know people in Ottawa, I called the number back twice and both times I received the, "This Number Is Not In Service". "Please Check The Number and Dial Again"!  From what has been reported here, I see that it s a scam.

CALLS EVERYDAY... leaves no message. I called back requesting to be removed

looks like whomever this is is at it again.....i didn't answer as i knew it was a call from ontario canada....so i called back and a voicemail greeting says the mailbox is full....whatever....obviously whomever this is is up to no good AGAIN!!

Caller ID says Unknown Name, I called back and it says message box full.  No idea who it is.

cALLS ABOUT ONCE A WEEK -LEAVES NO MESSAGE-CALLS AT VARIOUS TIMES IN THE EVENING AND LATE AFTERNOON. HAVE BEEN GETTING THESE ONTARIO CALLS FOR AT LEAST A YEAR NOW

Have received numerous calls also.  I called back from my home phone and got a message that the number was disconnected.  Called from my cell and work phones and got a message "I'm a big jerk and I leave erroneous telephone calls with no messages".  He is a big jerk and he does make erroneous telephone calls with no messages.