Who called from 9512920938

I got a call from this number but he never answered back

Calls my cell several time a week several times a day.  Does not leave message ans no one answers when I say hello.

Rings and leaves no message.  Probably Robo-dialer.

No one answers

When u get calls from unwanted numbers or unknown....and u answer, thats how they get info from u....they'll look up your identity and thats how they hack....careful people...i never answer no one i dont kniw....if its that important they'll leave a message