There is no Airspace A over Hawaii.

Not only no Airspace A over Hawaii, but portions of Alaska have no Airspace A and the island of Santa Barbara (just southwest of Los Angeles) and the Farallon Island (just west of San Francisco) have no Airspace A either. I am on a quest to discover why these airspaces were excepted from Airspace A coverage. I would appreciate any information concerning why they are not included.