Technically, Delta’s 12status is supposed to be restricted to WA residents but you can register with a WA zipcode of your choosing and you should be set to go. I even tossed in a WA address for safe measure. Regardless I keep getting “SkyMiles 12status Account Error” email stating
We noticed that information you used to register for 12status doesn’t match your SkyMiles account information. Please update your membership information in order to proceed.
But the good news is that my miles keep on posting.