Postal Index Number (Pin Code) is a six digit long code used by Indian post department. Every city of India has been assigned with pin code to deliver the posts and packages to the correct area. The very 1st digit of pincode represents the region while the 2nd digit represents the sub-region. The 3rd digit represents the sorting of district within the region itself. And the last 3 digits represent the individual post office. You may also visit pincodearea.in for getting village-wise list of postal codes.
It was on 15th August 1972 when the department of posts announced the pin code system. This system was created by late Shriram Bhikaji Velankar, a noted Sanskrit scholar. There are a total of 9 PIN zones in India that comprises 8 regional zones and 1 functional zone which are mentioned below :
Zone 1 : - The very first Indian postal zone is alloted for the region of Delhi, Chandigarh, Jammu and Kashmir, Punjab, Himachal Pradesh and Haryana
Zone 2 : - Postal zone 2 covers the regional areas of Uttarakhand and Uttar Pradesh.
Zone 3 : - Regions of Dadra and Nagar Haveli, Rajasthan, Daman & Diu and Gujarat come under the zone 3.
Zone 4 : - Zone 4 reflects the regions of Chhattisgarh, Maharashtra, Goa and Madhya Pradesh
Zone 5 : - Karnataka, Telangana, Andhra Pradesh comes under the zone 5.
Zone 6 : - Postal zone 7 is alloted for the regions of Tamil Nadu, Lakshadweep, Puducherry and Kerala.
Zone 7 : - The zone 7 reprensts the regions of Arunachal Pradesh, Andaman and Nicobar Islands, Assam, Meghalaya, Manipur, Nagaland, Odisha, West Bengal, Sikkim, Tripura and Mizoram.
Zone 8 : - Zone 8 covers Bihar and Jharkhand
Zone 9 : - Postal zone 9 is allotted for the Army Post office (APO) and FPO (Field Post Office) in the country.