Who called from 5053550115

I have received many calls from this number and wait about 10 seconds then hangs up. When I tried to call the number it just disconnects

I keep getting calls from this number. I do not know who it is. When I answer I just get silence. When I try to dial it something really weird happens and the phone just disconnects instantly. I cannot dial this number. Any ideas?

Received a call from this number, left no message.  Didn't answer it as I didn't recognize the number.

Received a call from this number, I don't answer calls from unrecognized numbers. Left no message.

unknown