A PIN Code in India is a specific code assigned to one or several post office(s) in one geography by the Indian Postal Services to facilitate easy and accurate delivery of posts and parcels. The system was introduced in 1972. A PIN Code currently has six digits, where the first digit of the PIN Code denotes a geographic zone in India, while the first two digits represent the state (or area) of delivery. The third digit of the code indicates the district. To ensure a more accurate identification within the district, the last three digits of the PIN Code act as a local code of the post office(s).
In the future, the Indian Postal Service plans to add two more digits to this code, keeping in mind that various machines or automated processes may become involved for a more accurate delivery process. At present, the department is experimenting with using this 8-digit PIN Code in multiple regions around the country.