This number, and a couple of others similar to it from that area code, has been calling since last year.  I have long since blocked all of them.  When they did get through, there was no message.  The call was followed up by several "Out of the Area", "Anonymous", and/or "Private" labeled calls to mention a few, which are automatically blocked by my system.  It seems they are "line testers" looking for working numbers.  They are all obviously up to no good with nothing else to do.  Perhaps they have peaked out their job potential given their level of education.