N31D is reserved. Fee-paid reservation held by Usa N Numbers — if it isn't renewed, the FAA releases it on Apr 21, 2027 (in about 8 months).
Checked against FAA data from Aug 23, 2026. Not an official FAA determination — always confirm with the FAA before filing.
Reserved by an individual or company for $10 per year.
Reservations lapse more often than you'd think. Check back around Apr 21, 2027 — if the holder doesn't renew, it becomes available. See everything scheduled to free up in April 2027.