Who called from 2064456049

I received call at 9:13 PM ET.  I answered the phone and no one on the other end.

I received a call at 9:23pm et.I answered and it hung up. I called back the number and there was a recorded greeting asking if i want to put on the do not call list

I received a one ring phone call on my home phone from this number 206-445-6049 8:34 am Central, Saturday 20 Feb 2010

Reported this number to the National DNC Registry on 2-20-10 after receiving multiple calls in a three day period.

also got multiple calls with funny rings, i just blocked this number so they can not call back