Oddly enough, check out what happened to me, THEY USE THIS TO FORWARD PHONES TO!
I got a call with no one on the other end, a day later I started to receive on average 60 to 70 calls a day for someone I did not know nor were these people calling my number. I work nights and most of these calls were placed to my home between 0700 and 1200. I called my home phone carrier (Videotron as I live in Quebec Canada) and asked them to fix the problem, they wanted to charge me 29$ to change my phone number.....Scam...????

Wow!  Sure glad I just missed a call from this number!
Is there no end to the scams all these 'ne'r-do-well's can come up with?!!  
I used to feel a bit odd for hesitating to answer calls when I didn't recognize the number.  It is quickly becoming a steadfast rule!  Thanks for the posts (-and warnings).  

Je constate qu'il est mieux de ne pas répondre.... je recois minimum 2 appels par jour.

Videotron son tu fatikan .. Cest koi ils vendent les liste de numero a nimporte ki !!

Same here in Toronto, Ontario. Rang 3-4 times, when I picked up there was dead air, but the number did display.  We are ramping up to a voting campaign so I am getting used to strange numbers these days.
Lee