title: Telephone Number State Code In Dropdown + Phone Number
body: <p><img src="https://i.stack.imgur.com/YnPJK.png" alt="enter image description here"></p>
  
  <p>I'm not really sure how to ask this question. So, I hope you can understand by looking at my photo here.</p>
  
  <p>I'm creating HTML form to grab subscriber's telephone number at first stage. Now, I want to change it by having state code in front using <code>&lt;select&gt;</code> and <code>&lt;option&gt;</code> followed by the rest of the phone number in <code>&lt;input&gt;</code>.</p>
  
  <p>Eg: +6010123456789</p>
  
  <p>The telephone number field has <code>name="telephone"</code> and <code>id="telephone"</code>. I'm not really sure how write this. Hope you can help me with this.</p>
  
  <p>Thank you.</p>