title: Need a regex that makes sure the number starts with 01 02 or 08 and is 10 or 11 digits long
body: <p>Am having hard time crediting a regex to check if a number starts with <code>01</code>, <code>02</code> or <code>08</code> and is ten or eleven digits long. </p>
  
  <p>For example I want numbers formatted like this to pass:</p>
  
  <pre><code>01614125745
  02074125475
  0845895412
  08004569321
  </code></pre>
  
  <p>and numbers other forms to fail, number like:</p>
  
  <pre><code>0798224141
  441544122444
  0925456754
  </code></pre>
  
  <p>and so on. Basically, any number that does not start with <code>01</code> <code>02</code> or <code>08</code>.</p>