title: List of possible regions for X-AppEngine-Region
body: <p>The <a href="https://developers.google.com/appengine/docs/python/runtime#Request_Headers" rel="noreferrer">GAE Docs on Request Headers</a> say...</p>
  
  <blockquote>
    <p><strong>X-AppEngine-Region</strong></p>
    
    <p>Name of region from which the request originated. This value only
    makes sense in the context of the country in X-AppEngine-Country. For
    example, if the country is "US" and the region is "ca", that "ca"
    means "California", not Canada.</p>
  </blockquote>
  
  <p>Where can I get a list of all regions that could be returned? And why does it have to return "ca" when it can just return "California"?</p>
  
  <p>Thanks!</p>