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The India Post has Postal Index Number or PIN or Pin code in its post office numbering. It is a six digit long number. The present system of Pin codes was launched on August 15, 1972. The PIN was brought-in to make the manual sorting & delivery system of mail easy as it guides in eliminating confusion over improper addresses, dito names of locations and use of many languages by people.

There are 8 regional PIN zones as well as a functional PIN zone (especially for the Indian Army) in India, that adding to 9 PIN zones. The debut digit of the PIN code mentions the zone or region, the 2nd describes the sub-region, finally the 3rd digit indicates the sorting district within the region, and the last 3 digits indicates to the delivery Post Office.

Following are the state wise pincodes of corresponding each districts post offices