number plate BrE
license plate AmE
license tag AmE

You don't move out of here I'm writing down your license plate.

They are said to be good enough to read license plates.

What if not everyone had to have a license plate?

He also got a good look at the license plate.

She did get a look at the license plate, though.

He was looking for the front license plate, of course.

And Al, who stood near the car, looked at the license plates.

She wasn't thinking clearly enough to study the license plate.

"Did your friend happen to see the license plate number?"

The state hadn't spent four years teaching him how to make license plates for nothing.