The chasis number on a car can be found most likely close to the engine, on the body frame. It depends on the make or brand.
A 17 digit numbers and letters, the manufacturer uses all but last 6 for their purpose and last 6 are numeric sequence of car made
the chassis or vin number on newer cars have 17 digits
28 belongs to two Cars, the Nitroade Piston Cup car Apple computers Piston Cup race car.
The 10th digit is the year of manufacture.