Got a call from this number today (2/23/2017) at around 11 AM.  Caller ID showed up as "UNIV OF CO 303-786-3884".  I let the call roll thru to voice mail.  Whoever it was didn't leave any message.  Later in the day I tried calling the number back (using *67 to block my own CID).  I got a recorded message that said: "You have reached a non-working number at the University of Colorado.", after which my call was disconnected.  I doubt that whoever was calling was actually with the University.  In any case, I've added this number to my phone's Call Block List.