N7521P is reserved. Fee-paid reservation held by Southwest Airlines Co. — if it isn't renewed, the FAA releases it on Aug 4, 2027 (in about 12 months).
Reserved by an individual or company for $10 per year.
Reservations lapse more often than you'd think. Check back around Aug 4, 2027 — if the holder doesn't renew, it becomes available. See everything scheduled to free up in August 2027.
N7521P has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N7521P that aren't assigned or reserved: