Who called from 5164536968

updating newspaper subscriptions

This person calls me twice a week. I once picked up but then the person says hi and says my name and just listens. Really weird.

I keep getting calls from 453-6968 and hang up

Same as above. I  try to block it or put on a special annoying ringtone so I don't have to even look at the caller id.

Called twice within a few hours. I answered second call and they hung up after I said hello a few times.