What do you mean? Do you mean what's the latest Need for Speed called or?
If so, the latest Need for Speed was back in 2015, Need for Speed: No Limits. A new Need for Speed game is getting released in November this year and it'll be called Need for Speed Payback - available to all consoles and PC.
For the latter titles just check out their Wikipedia page, they have the whole list there

I personally don't really play them but still.