CIN : Corporate Identity Number, (GLN), (LLPIN)

When a Company gets registered in India, be it an Indian Company, whether Public Company (listed or unlisted) or a Private Company or even a Foreign Company having place of business in India or otherwise, it is allotted with an Unique 21 digit identification number known as ‘Corporate Identity Number’ in short ‘CIN’.

(1) CIN of Reliance Industries Limited is L17110MH1973PLC019786.
(2) CIN of TATA Industries Limited is U44003MH1945PLC004403.

Constituents of 21 Digits:

1st Digit
Either it is ‘L’ or ‘U’, where L is for Listed Companies, U is for Unlisted Companies.
Next 5 Digits
The Next 5 digits is the Industry Code Company of a Company. In India it is known as ‘National Industrial Classification-2004’ (NIC-2004)
Next 2 digits
This 2 digits is for the State Code for the Company. The State wherein its registered office is situated.
Next 4 digits
This 4 digits is for the ‘Incorporation Year of a Company’
Next 3 digits
These 3 digits represents the Type of a Company whether Public Limited Company (PLC) or Private Limited Company (PTC). (In case of a Private limited company which is a subsidiary of a Foreign Company, it is FTC.
Last 6 digits
It stands for the ROC (Registrar of Companies) Registration No.

Likewise, Foreign Companies in India are allotted with Global Location Number (GLN), and Limited Liability Partnership (LLP) is allotted with LLPIN.

The CIN/GLN/LLPIN of a Company in India can be found at Ministry of Corporate Affairs site.