I received a call from this number at about 7:15 am CST.  When I answered, I said "Hello" then a very faint voice repeated "Hello."  I then said "Hi, can I help you" and the caller hung up.  I was concerned, but I didn't try calling the number back.  I couldn't find anything on this number on the reverse lookup and I was curious as to whether or not anyone else has ever received a call from this number.