D is one of Dubai's single-letter emirate codes; low numbers denote an early registration.
🇦🇪 Plates from United Arab Emirates
UAE plate on a Lexus LX. In the Emirates, low numbers are the whole point.
Abu Dhabi plate on a Rolls-Royce Cullinan.
reads: 420
Dubai plate, code E, on a Rolls-Royce Phantom a long way from home.