They did the same too me.  I told them.. you tell me my DOB and I'll tell you if that's right.  I"m not giving some random person my info when they call me and don't identify!

This number called me and left to message

They've called my job and wanted to verify my name and DOB. When I refused they hung up.  

This number calls my house SEVERAL times a day! They never leave a message. I finally blocked their number. I have no clue who they are.

Me too.  But nobody said anything.  Seemed like a dead line with no sound whatsoever.  Lasted one minute.