Who called from 8306200876

I keep getting phone calls from this number  several times a day no one ever says anything it is getting very annoying

the caller ID on the calls from 830 620 0876 was one said  Whittenburg  and one said Mark Werner

I just got another call from Wittenburg  830 620 0876

I have gotten 15 calls from Wittenburg and Mark Werner I have reported this to my phone carrier

I too have received 6 calls from this number over the past 5 days.  I only answered it twice, once a recorded sounding voice said "Good bye" and the second time there was nothing.  This is so frustrating!  What did your phone carrier say when you told them?