N9DU is reserved. Fee-paid reservation held by Short-N-Numbers — if it isn't renewed, the FAA releases it on Oct 6, 2026 (in about 3 months).
Reserved by an individual or company for $10 per year.
Reservations lapse more often than you'd think. Check back around Oct 6, 2026 — if the holder doesn't renew, it becomes available. See everything scheduled to free up in October 2026.
N9DU has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N9DU that aren't assigned or reserved: