N40092 is reserved. Manufacturer temporary reservation held by Boeing Co — if it isn't renewed, the FAA releases it on Nov 26, 2029 (in about 3.4 years).
Temporarily reserved to an aircraft manufacturer.
Reservations lapse more often than you'd think. Check back around Nov 26, 2029 — if the holder doesn't renew, it becomes available. See everything scheduled to free up in November 2029.
N40092 has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N40092 that aren't assigned or reserved: