Called several times in a row. Each time I turned off voice mail and let it ring till they finally gave up.

First time called by this specific number, but...
I'd been getting a slew of calls (several per day, to a "Do Not Call" listed phone)  from 720-386-2595: "Colo USA".
Same area code and exchange (+ first digit of number). Could this be a big mill with many #'s, or just a big spoof who likes this number? Anyway, blocked that and now this new # is calling. Again, will block & report, and hope others will too.

Intermittent tone is left on my voicemail