Your Stoxkart demat account number is a 16 digit number combining your DP ID and Client ID. Both are of 8 digits each. The Stoxkart DP id is 12019100. It is common for all customers.
You can contact the customer care or check your welcome kit provided at the time of the account opening to know your client ID. A sample demat account number for Stoxkart customers is 1201910012345678.