Who called from 4043415954

They called my cell and left no voice mail.  I called them back from one of our anonymous work phones so they couldn't annoy me.  It sat there and did nothing for about 30 seconds, then gave me a rapid busy signal and said "Request Denied".  Stupid jerks.  Leave me alone.  I'm trying to work and you [***] are interrupting me with your inane phone calls.

No answer, prank or telemarketer?

I answered and nothing was said. After about 10 sec, the call disconnected. Scam.

Call and no answer when I picked up. Scam

I did not answer. No voice mail. Obvious some sort of con or number soliciting scam.