Who called from 5204680228

Call received 4:21pm November 6, 2015.  Caller listed as "Tucson, AZ".  When answering machine came on they hung up. Putting them on call block.

Did not recognise as Caller ID only showed "Tuscon, AZ". No message left.

I am on the DO NOT  CALL list.    Today at 4:40 PM from Arizona!

These darn people never give up  It is a little after 9 on Saturday morning, and they call. HOW CAN THESE CALLS BE STOPPED????? I am on the do not call list, but that has not stopped these annoying calls.

Call came from Tucson Az. Do not know from who just the town and state showed on phone