Pin Code Search & India Post Offices DataPin code search tool will help you to find post offices and pin codes in different states of India. This is a simple pin code search tool that will let you search using Indian state, district and Post Office name. Pin Code System in IndiaPincode or Postal Index Number is a numbering system in India for all post offices under India Post. Pin Code system was first introduced in India on 15 August 1972 by Shriram Bhikaji Velankar. It was great move by India Post which helped whole process of Postal System in India. It solved the confusion of similar place names, incorrect address issues and most importantly it helped to solve language diversity issues while sorting letters. Our database of India post pin code system consists of 1,54,700 + post offices, their location, districts, state and many more. Pin Code NumberingThe 1st digit of PIN represents region, 2nd digit indicates sub region. The first 3 digits together indicate a sorting district. The last 3 digits refer to the delivery Post Office.