title: Is there easy way of calculating number of IPs from 2 given IP addresses?
body: <p>I want to calculate number of number of IP addresses from 2 given IP addresses.</p>
  
  <p>Example: <code>127.0.1.10</code> and <code>127.0.0.200</code> is <code>67</code> IP addresses..</p>
  
  <p>What's easy way of doing this?</p>