Who called from 2164133587

My phone rang at about 8:15 AM on Wednesday, July 22, 2015, and again at the same time on Thursday, July 23rd.
The Wednesday call was not answered and the caller left no message.  The Thursday call was answered and the line was dead on the other end.

Same "dead air" call again on Thursday, July 23rd.  8:57AM.

called and said that they were a debt  collection never asked for anyone to   call 1-877-821-1658

This number just called me. I said hello twice with no response so I hung up! This number will be blocked!!

Called but left no message.