Who called from 6268956565

Twice I've received calls from this number...when I answer there is dead air, then hangup. When calling back this number, it says the number cannot be completed as dialed.

I also received a call from this number.  Dead air when I answer.  Then they hang up.  I called and it says the number cannot be completed as dialed.

I don't understand them.  They hang up if I answer.  They hang up if the machine gets it.  You can't call them back.

WHY CALL AT ALL?  Just for the sadistic fun of making people run out of the shower to the phone?

I was just called again.  I was called at 10:11 and again at 10:57 today.  Same as before - no one there.

Another call.  Same thing.  I'm really  getting tired of this.  I'm on the National Do Not Call list.