recorded message and then hangup.  From Denver.

Same story here.  I never answer an unknown/private/blocked or out-of-state phone number, so now this number has won its place on my Do Not Answer list, and also got added to reject list.

Robo Spam Call. Trying to sell credit card machine processing.

Robo recorded call from Boulder CO to our business- added to our blocked number list. We are so tired of these type of calls that waste our phone time.

Same issue as reported.  Calling on a DO NOT CALL registry number.  Does no good to ask them to remove you!