calls multiple times with nobody speakign once answered

This number calls house about three times a day. Every time they call, there is Moby on the other end. Just silence and then hang up

Just started receiving these and wondered who it is. Glad someone posted that it is junk. Wonder what 'NATAD' means.

I get calls from this number several times a day. I have as them not to call again and remove my number from their list.  Also, when I redial the number no one answers.