$ ping -c1 -p 0062865da9fc6cb23816e4a022d2fe00 pingb.in
 
$ curl pingb.in/p/62865da9fc6cb23816e4a022d2fe
 
$ dig 62865da9fc6cb23816e4a022d2fe @pingb.in
 
$ dig 62865da9fc6cb23816e4a022d2fe.ns.pingb.in
 
C:\> nslookup 62865da9fc6cb23816e4a022d2fe pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/62865da9fc6cb23816e4a022d2fe">]>
    <foo>&xxe;</foo>
 
Waiting for ping...