they are a non-profit/charitable organization - according to the DNC-list these organizations are still permitted to call

Calls all the time, more than once a day with no one at other end. How do I stop them??

got a call three times on Aug 30/31, no response on other end of line\
I thought when I suscribed to the no callers list, I would be exempt from this type of call
What gives?

CP ... I don't know why I thought it was CF, but any way... kudos to CP who were polite, not aggressive and actually showed up :)

recycling matters ,told them twice already to stop calling ,they do for a while 2 months .then it starts again.