This is an autodialled call. The machine auto scrolls through sequential numbers until it gets a response. It then knows that number is active, and logs it for future calls. It's all done automatically.

If they were on the receiving end of this harassment calling program, they might consider finding another way of doing business. Now that I know who is calling (and shame on them) I am not very likely to help Heart and Stroke Foundation with anything. And yes, I am on the "Do Not Call List". so how did they get my number? I suspect illegally !

these a&&holes called before 8:00 am on a saturday, twice.we are on a no call list too

Phone call from (403) 781-1989 March 3 at 7:02 pm.  Did not leave message.

That never happened.  We start calling at 10am

Call every early evening, no voice

I'm one of those door knockers.  If you don't want them, put up a "No Soliciting" sign.  I never approach such houses, and I instruct any canvasser reporting to me to do the same.

This is the Heart and Stroke Fund looking for door knockers. Only one thing more annoying than telemarketers and that's a door knocker. I support the cause, but not the outdated collection method. I hope they change their outdated methods