Corporate Identification Number
21-character unique identifier issued by MCA to every registered company.
CIN is a 21-character alphanumeric code issued by the Ministry of Corporate Affairs (MCA) to every Indian company at the time of incorporation. Format: L/U + 5-digit industry code + 2-letter state + 4-digit year + 3-letter ownership + 6-digit serial. Example: U72200KA2026PTC042871. Listed companies start with L; unlisted with U.
Every Pvt Ltd, Public Ltd, OPC and Section 8 Company. Required on every official letterhead, invoice, and government filing.