Postal Index Number (PIN) or PIN Code is a 6 digit code of Post Office numbering utilized by India Post. The PIN was presented on August 15, 1972. There are 9 PIN districts in the nation. The initial 8 are geological districts and the digit 9 is held for the Army Postal Service. The principal digit shows one of the areas. The initial 2 digits together demonstrate the sub locale or one of the postal circles.The initial 3 digits together show an arranging/income area. The last 3 digits allude to the conveyance Post Office.