I received a call at 5:25 am. The number was like the rest...too long and unreachable when returned.  This is a business line and I was frightenend that someone was injured at work.  Does anyone know how to block this nonsense?

Called at midnight and like, 6;41am....and on a sunday morning! I tried to call back but the number says that it can not be completed as dialed. The full number was 8201080600995. Not idea. Anyone else know?