Who called from 5712347888

I am getting these phone calls, they dont leave a message and when I call  back, the machine says, this number is no longer in service, does anybody knows who is the caller?

Same thing here. Calls around 8am. Had music playing did not say anything and hanged up on me. Call it back out of service

Called. Blocked. Problem solved.

Got a call from this # and I answered. I could hear a TV in the background. When I said hello they accidentally the dial number keypad then hung up.

Did not answer since I dont answer unknowns. But the number left a message. It had some video game sounding music that played for like a minute and some seconds, then abruptly stopped, then an automated voice dictated some random digits, cut off, then the last seconds of the message silent.