They called my very private cell phone number at 10:07 AM PDT on 11 October 2016. The caller ID said "Estes Park, CO". I did not answer. They did not leave a message. My phone numbers are on the Do Not Call list. I will report them to DoNotCall.gov.
Never call them back, not even from a blocked phone. They have ways to unmask your phone number even when it is blocked.
I received a call from 970-235-5567 at 10:14 am on October 11. 2016. Sent to voice mail. They did not leave a message. I checked the number on GOOGLE and found it to be a scam number. My phone is on the Do Not Call List.