MOVIE PROP PLATES
These are fake license plates used for TV shows and movies - usually they don't match any valid number sequence so they don't mimic any "real" plates.
But sometimes, they "miss" and the numbers are valid.
plates.2gat123.com Inverted NJ map
Plastic Cast of 1985 plate
and a valid number
NJ plate "XAB-235" on a Mustang from one of the John Wick movies.