Got a call from this number yesterday (9/28/2016) at around 7 PM. Caller ID showed up as "Out of area 1-720-862-3915". Let it roll thru to voice mail. They didn't leave any message. Tried calling the number back today. It goes to an automated phone system with a generic message about what their office hours are -- but doesn't give any indication of a company name. If they try calling back again and don't leave a message, I'll add the number to my Call Block List at that time.
I received a call from this number yesterday and today. The caller didn't leave a message. I called the number back today and a man answered, I hung up on him and blocked the number.