that same number called me yesterday. and when i picked up and said hello, no answer but i had the feeling that someone was on the other line.

I get a call from this number every day. It is a fax calling

I received this call on
Friday October 3rd 2008 at 6:54pm
Friday October 3rd 2008 at 8:42pm
Saturday October 4th 2008 at 10:35am
and
Sunday October 5th 2008 at 4:47pm
The calls on October 3rd came across as faxes,
but the calls on the 4th and 5th left no message or fax sound.

Caller ID: (613) 232-7437

I got two calls from this number today.  The first at 7h03pm.  Called back and like many others, got the "number is not in service" message.  Got another call at 7h51pm.  Answered it and it was Penny Collenette's campaign asking for my vote.  
From what I've read above, sounds like this number is being used by different services at different times.  This info will probably not help anyone looking to find out who's calling them after the election as I'm guessing the number will probably be taken over some other service afterwards.

This call came in from someone supposedly representing TD Canada Trust asking who made the last transaction at the bank etc.
Obviously a scammer.

Got a call from this number, nobody there. Came to this site.Didn't bother calling back.  (October 24, 2007)