Locating Demat Account Number Demat account number also called as Beneficiary Owner ID or BO ID is a combination of your Depository Participant Identification (DP ID) and your customer/client ID. Demat account number = DP ID (8 digits) + Client ID (8 digits) 1. Zerodha      For Zerodha BO ID, login to Kite web … Continue reading Where to find your Demat account number?