Robo-call that will connect you to   "air duct cleaning service',   reportedly a business in silver-springs, Maryland.   I'm on the do not call registry so, I shouldn't get these calls at all.  They hire a robocall service that ignores the do not call registry. The company obviously doesn't care, so how honest could they be at cleaning your air ducts?    Perhaps its just some sucker probably bought a franchise for 'air duct cleaning' tools which said they 'guaranteed' business.  Poor guy.  If that's the case he  Wasted his money.  He'd be better off paying for mailer service and postage to put cards in your mailbox.  Still,  it's a shady deal. If I needed such a service, I'd look it up in the yellow pages or on the internet and get someone close (cheaper).