Joke about/on something

?I wonder what are the differences in meaning and which ones are correct English.

1. He used to joke about my accent.

2. He used to joke on my accent.

3. He used to joke about my face.

4. He used to joke on my face.

5. He used to joke me about my face.

6. He used to joke me on my face.

I guess only 2 and 4 are wrong.