The Postal Index Number (PIN), commonly known as a PIN code, is a six-digit code introduced by the Indian Postal Service to facilitate the efficient sorting and delivery of mail within the country. The PIN code system was introduced in India on August 15, 1972, by Shriram Bhikaji Velankar, an additional secretary in the Union Ministry of Communications.
The PIN code system serves as a unique identifier for different geographic areas, helping postal workers and automated sorting systems to quickly route and deliver mail to the correct destinations. Each PIN code corresponds to a specific region, city, or locality, making it easier to manage and streamline the postal process.
The six-digit PIN code is structured as follows:
- The first digit represents the region of the destination state.
- The second digit narrows down the delivery district within that region.
- The third digit further refines the sorting process, indicating a specific sub-region.
- The last three digits help pinpoint the exact post office within the sub-region.
For example, in the PIN code "110001":
- The first digit "1" represents the Northern region of India.
- The second digit "1" narrows down the delivery to a specific district within that region.
- The third digit "0" refines the sorting to a particular sub-region.
- The last three digits "001" point to the exact post office.
By using PIN codes, the Indian Postal Service has significantly improved the accuracy and speed of mail delivery, ensuring that letters and parcels reach their intended recipients in a timely manner.
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