I received a call from this number and no message.  Annoyed

This number called me, as well.  When I called back, it was the University of North Texas.

Have received calls from this number for two or three days.  We never answer, they never leave a message.  Have never tried calling the number back.  Have been receiving calls from other completely different numbers since the beginning of the year.  The same thing happened in the early part of 2007 and eventually they stopped.  We have not renewed some magazine subscriptions and wonder if the calls could be related to that.