Who called from 5022082007

Called a few minutes ago, I did not answer, they left no message.  Caller ID just showed their number no name.

Called here today April 23, 2015 at 6:10 PM. Never left a message. I don't answer calls from numbers I don't anymore. Too many are only trying to scam Americans out of money.
I usually try to research the number before I block them but there are not many posts yet for this number. My main concern are those people who have elderly family members or those who don't know how to research.
The best thing I did for these scammers is to buy a phone where I can block calls.

got a call from this number on 4-23-15. no one answered when I said hello

I called the number back. Message said it was a polling company and no one was there.

This was a call from a Koch Brothers funded polling agency, i360.   http://www.businessinsider.com/koch-brothers-data-firm-i360-2014-12