The company didn't say how many are in each city, and has taken a far more cautious approach to scaling the network than CEO Elon Musk had promised.

July 21 : Tesla on Tuesday expanded its robotaxi service to Orlando and Tampa, as the electric-vehicle maker races to prove that it can scale its autonomous ride-hailing business…

The state of Tesla's robotaxi service will be a key topic of discussion during its earnings call on Wednesday. The stock is up over 2.5%.