Who called from 9724004675

I got a phone call and they just hung up after me answering it

getting repeated phone calls from this number and if I answer they hang up.

Got a call from the number but no one there when I said hello.

Everyday at least, I get 5-8 calls from 972-400-4675. it does not talk and hangs up.

This number has called me 8 times in the last hour. They hang up, so after the second call I've just been ignoring it but they keep calling.