I received a call from this number Jan. 27, 2010. Same result: I answered it and there was nothing on the line.

(613) 232-7437 called at 4:10 PM today. This is some kind of relay number
that you can not return calls too. It is most likely used by many outfits
wanting it to appear that the call is local. It it used by everyone including Collection Agencies such as IQOR or the former CBCL; Canadian Bonded Credits Ltd. It's a faked number or spoofed number from Canadian Bonded Credit in Toronto ON. or the now called IQOR attempting to appear local to ottawa residents. Don't even call the number back, you will only hear that "this number is not in service", But it is in service! When I dialed *57, It said; "The number has been traced". So everyone should do this if you get a call from this number. So, GET IT ON YOUR CALL TRACE LISTS with your local Phone Company.

Another New Note For Today: +1 877-503-2115 called at 5:10 PM today.
One hour later I get this call from IQOR +1 877-503-2115).
First 613-232-7437 called at 4:10 PM
then 877-503-2115 called at 5:10 PM
Both calles were traced!!! It's Them!!! Who else?

Its someone calling from skype... Got a call I was my sister from overseas

I think this is a number long distance carriers use. Here's the deal, I have a vonage line and I wanted to test its call forwarding capability while I was overseas. I called the vonage line which call forwarded to my local cell phone, but the number showed on my cell phone (and vonage call display) showed (613) 232-7437.

I just received a call from this number and it was Rogers completing a survey on their services.

It's probably a spamer's dialer checking to see if numbers are in service. It could be faking the "not in service" message by playing back to you the same message your carrier uses.