Who called from 8166450021

Received a call from this unknown number and didn't answer it because I was at work.  Otherwise I would have answered it, because I like messing with these idiots who robot dial.  Anyway, I called the number back and it continuously rings busy.

Received call on my cell phone. Caller ID says MO, USA. I answered and was immediately hung up on. If they call again I'll let it go to voice mail.

got a call i coudnt answer bcos i was busy..then i called back it says not a valid no.

I, too, received a call from this number, but was unable to answer because I was sleeping. When I tried to call it back, one time it said it was not a working number, and another time it was busy. I hate people who do this kind of thing. I am recovering from a car crash and do not need this kind of crap!!!!

Called me just a few minutes ago, missed the call as I was busy. Called back to a busy line. Twice. Added it to auto-reject.