The telemarketers and scammers frequently run all of the numbers autodialed in a 10,000 number block and those that ring but don't answer and those that do answer are put on their personal solicitation list or their robo-call list. Since this search is done by computer they don't have to waste time with unassigned or non-working numbers. The Federal Laws regarding "Do Not Call" are only observed by legitimate business people. The crooks and scammers know the Feds are not trying to catch them and if they do they won't do anything to them.
WATERLOO NY BACK AGAIN... new phone number. I'd be voting for Madam Secretary if I wanted to continue the same level of the current gov.... "DON'T CALL LIST" IS NOT SO FUNNY..