Example.com, Example.net, Example.org are reserved.  I found this on http://dnsstuff.com ( http://member.dnsstuff.com/forums/showthread.php?t=1572913 ). Here is the RFC http://www.rfc-editor.org/rfc/rfc2606.txt  I learn something new everyday.   I'll be using example.com in my 'examples' in the future.