Robo-terrorist caller scum pre-recorded message started playing the moment my machine clicked in to say "Sorry Rectums, no one available" so I know not who they might have said they were, but I'm sure they failed on purpose to do so. Anyway, contact the Consumer Union (Consumer Reports) site www.EndRobocalls.org and sign their petition to pressure the phone companies and lobby the government. It won’t cost you a cent! BTW, recent news articles (early July 2015) indicate Verizon is going to screw us more during their attempt to deregulate communications services and fees which could cost us more by buying into their anonymous call intercept useless service, etc.
When I asked the caller what company? he repeated Air Duct Company. When asked where he was calling from he indicated Chicago Ill. I advised that I'm on the do not call list and that I will be filing a complaint, he hung up. The next time I get a similar call, I plan to give a fictitious name and address. Let their client waste his time and gas on their phony info.