title: How to write in network address/netmask the following address space?
body: <p>I'd like to ask how to write in network address/netmask the following address space:</p>
  
  <blockquote>
    <p>63.39.191.192 - 63.40.192.223</p>
  </blockquote>
  
  <p>On paper, I couldn't figure any way of doing it, so I tried using <a href="http://www.tuxgraphics.org/toolbox/network_address_calculator_add.html" rel="nofollow">a network address calculator to figure it out</a>.</p>
  
  <p>I inputed the first IP address and started toying with the netmask. </p>
  
  <p><strong>What I couldn't understand is how the first and last usable address varied based on the netmask.</strong></p>
  
  <p>So, here I am, hoping that you might explain to me how the first and last IP address are determined based on the netmask and how to solve that problem.</p>