To check Demat details linked to your Upstox account, follow these steps:
Step 1: Login to the Upstox app using your 6-digit PIN or biometrics.
Step 2: Click on ‘Account’ at the bottom of the screen.
Step 3: Click on ‘My Account’.
Step 4: Click on ‘Profile’.
Step 5: Here, you will find the 16 digit Demat account number and your plan details.