This number has been calling my phone for days now....720-452-5525.  Until today, I never answer.  When I did, the phone on the other end hung up.  I don't know who they are but worry that there is a scam out there if you pick up the call they can access information or something...I thought I heard about it on the news a couple of weeks ago that if you answer...oh shoot. I can't remember but I know I should NOT have answered!  I would advise anyone else to not answer even though it's very tempting.

I work in a school system and when I continuously get calls from numbers such as: 720-452-5525, 701-557-9150, and so on;  when you ask them where they're calling from and they can't speak proper English, their connection is horrible and they lie.  The best one begins with:  "The FBI ........, etc. (who have several numbers).  I can't count the number of times I get calls from THAT one each day.  ALL OF THEM should know where they're calling and who they need to ask for.  They need to stop bothering people with their simple sales pitches while trying to intimidate with government names, etc.

been getting calls all week from this number:  720-452-5525.  Leaves no messages, just keeps calling.
The caller ID says "Contact Center"