I have an upcoming flight and I noticed that the aircraft has been performing quite a few flights numbered in the 7000 flight range, eg today operating as AS7006 SEA-JNU-ANC. The flight doesn't show up in the schedule search and doesn't seem to be bookable.
I'm curious. Are these cruise-related charters? Some kind of test or training flights? Cargo flights (it's a passenger aircraft based on the aircraft info on Flightaware.
ETA: Here is a link the shows the flights performed by N306AS
N306AS Flight Tracking and History - FlightAware Currently operating AS7006. Yesterday it flew AS7096 ANC-JNU-CDV-SEA