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Postal Identification Number (PIN)

15th August, 2022 Geography

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  • The 75th Independence Day coincides with another milestone in the country’s history — it was on August 15, 1972, that the Postal Identification Number (PIN) was introduced in India.



  • A Postal Index Number (PIN), or sometimes called a PIN code refers to a six-digit code in the Indian postal code system used by India Post. On 15th August, 2022 PIN has been celebrating its 50th Anniversary.


Why was the PIN code introduced?

  • According to the Department of Posts, there were 23,344 post offices, primarily in urban areas, in India at the time of Independence. But, the country was growing rapidly and the postal network had to keep pace.
  • The PIN code was meant to ease the process of mail sorting and delivery in a country where different places, often, have the same or similar names, and letters are written in a wide variety of languages.
  • The PIN system was introduced on 15 August 1972 by Shriram Bhikaji Velankar, an additional secretary in the Union Ministry of Communications. The system was introduced to simplify the manual sorting and delivery of mail by eliminating confusion over incorrect addresses, similar place names, and different languages used by the public.

Structure of PIN Code

  • The PIN is made up of six digits. The first number indicates the postal region — Northern, Eastern, Western, Southern; and number 9, which signifies the Army Postal Service.
  • The second number denotes a sub-region, and the third represents the sorting district.
  • The remaining numbers narrow the geography further to the specific post office making the delivery.
  • To be precise, the last two digits represent the delivery office within the sorting district starting from 01 which would be the GPO or HO.


Last 3 digits

  • The last 3 digits designates the specific post office within the district.
  • This Pin code comes under Dhakuria Post Office.
  • So, the Pin code suggests a place at Dhakuria in Kolkata, West Bengal.


What is Zip Code?

  • India is a vast nation with 28 states and least 718 districts. In order to identify regions, Indian postal department has allotted a unique postal code of pin code to each district/village/town to aid delivery of postal services.
  • Zip code is the postal index number which holds importance as the entire postal system of the country works around it. The zip code provides all the information related to your address and all-important deliveries ranging from letters to couriers or online purchases are depended on this code. This code is made up of six numbers offering complete information about the area where you reside. Each of these.


Is there any difference between Pin Code and Zip Code?

  • No, there is no difference between the pin code and the zip code of your locations.
  • Pin Code stands for Postal Index Number Code, which is also known as Zip code or the area postal code which is the post office numbering code system used by the postal services of India.