The DP ID is a unique identification number that serves to identify your Depository Participant. Anyone involved in buying and selling securities should be familiar with their 16-digit demat account number. The first eight digits within this account number represent DP ID, which is usually the same for every customer associated with the depository participant.
For instance, if you have a demat account with 5paisa, then every customer of 5paisa will have the same DP ID, which is 12082500.