How a Missouri license plate lookup works
A license plate is a pointer to a vehicle's records. Enter a Missouri plate and the state, and the lookup resolves it to the 17-character VIN. From there you can run a full history report — the same records you would get by entering the VIN directly. Because plates are only unique within a state, selecting Missouri matters.
What you can and cannot find
You can identify the vehicle (year, make, model) and unlock its title, theft, lien, and odometer history. You cannot get the owner's personal details: the federal Driver's Privacy Protection Act (DPPA) protects that information, and any service promising an owner's name and address from a plate is a red flag.