Call almost every day.  I am no longer polite with them and they still call.

The do not call registry is a joke.  Still get all sorts of unwanted calls.

These idiots called my unlisted number.  The first time they called, no one was on the other end so I called the number back.  Got a recording saying I could leave a message and it was forwarding me.  Then I got another recording saying that the voice mail box was full.  The second time, there was a person on the other end.  It's a duct cleaning company.  I told them to remove my number from their list.  We'll see what happens.

(416) 700-5678 I receive Daily calls from this number, 3 rings no one on the other end! Frustrating!!

They have called me every day this week between 3:50 and 4:05 p.m.   Same thing, when we pick up there's dead air.    I call back and get a recording that it's going to voice mail then the voice mail is set up to say it's full.

I, too will find their company information and report them.  I am also on the Do Not Call list, it has stopped about 95% of the scammers but these guys somehow get through.

What do they possibly get out of calling and saying nothing?  They certainly don't drum up business???

I just mess around with all these duct people until they hang up.  I like to pretend they are talking about ducks, and that I have a huge duck problem in my house.  It usually ends with me quacking at them until they hang up.  Once you prove you are a waste of time to them, they usually stop calling.

They called on Nov 3, 2011, didn't leave a message.  Again, this number is not recognized on 411 so I can figured who called and what they want.  Good thing I am away a lot.