Which would be the license plate number of Steve McGarrett's car in Hawaii Five-O, just one of the many questions answered by
The Hawaii Five-O FAQ. Honestly, I've never found myself wondering about any of this. Ironically, I remember passing a hotel while on a tour there, and the guide told us "that's the balcony that Jack Lord stood on in the opening credits" and I don't see the answer to that pressing mystery. Bummer.