There are 207 CA Foundation exam centres that you can choose from while filing the online application form. The exam centres will be allotted on the basis of your preference of the cities that you select while filling the application form. So even if you register for one zone, you can select any city for writing CA Foundation. There are no restrictions on that. It is good to select places nearer to you or atleast so that you can avoid last minute rush for transport. You also can correct the exam centres during the correction window. For the entire list of exam cities, check our page: https://finance.careers360.com/articles/ca-foundation-exam-centres