Who called from 2159894811

I received a call from this number two days in a row, no message left, if an unrecognized number calls and does not leave a message I will never answer.

This number calls me too...on and off over the last two weeks.
They do not respond when I answer and never leave a message.
Who is this number ?

Me too.  I finally answered and no voice on the other end.

Diversified Consultants.  A collection agency

Called me at 10am Saturday morning, said hello, no one answered back.