It is a company (Teleperformance) actually listed in the yellow pages...I called it back and was able to enter my number into their do not call list....it says it is for aspen automotive and either calling on behalf of your local car company about an upcoming service for your vehicle or to offer some specials etc....My guess, they get paid to contact you so in order to show they did they must show the call was answered so once the line engages, they hang up and  it looks like they are doing their job to the poor clients they are ripping off...getting paid for nothing