How can you identify NSDL or CDSL accounts ?

How can you identify NSDL or CDSL accounts ?

The CDSL Demat account number is 16 digit numeric code and NSDL code is a 14 digit numeric code that starts with IN. For example, a Demat account number assigned by CDSL will be 0143876589104321 while an NSDL Demat account will have a number in the format of IN01234567891011.