We only have a landline because Comcast provides one with their "bundle" package. Our daughter is the only one that has the number. I don't even know what the number is and have blocked over 100 of these phony calls. My wife and I use our cell phone numbers if we are required to give one. There is no use of reporting these to the DNC complaint hotline since the numbers are not traceable. There is no way we have any outstanding debts that would require a collection agency. Our fico scoreis over 800!!!