The Postal Index Number (PIN), commonly known as PIN Code, is a six-digit code system used by india Post to simplify and streamline the sorting and delivery of mail across the country. Introduced on 15 august 1972 by Shri Shriram Bhikaji Velankar, the PIN system helps avoid confusion caused by similar place names, incorrect addresses, and language differences.
How india Is Divided by PIN Code Zones
India is divided into 9 PIN code zones, numbered 1 to 9, along with a functional zone 0 for the army postal service (APS). Each zone corresponds to a geographical region, making mail sorting easier.
Breakdown of the 9 PIN Zones
Zone Number
Region / States Covered
Starting PIN Digit
1
Northern region – delhi, Haryana, Punjab, Himachal Pradesh, Jammu & Kashmir
1XXXX
2
Northern region – Uttar Pradesh, Uttarakhand
2XXXX
3
Western region – Rajasthan, Gujarat, Daman & Diu, Dadra & nagar Haveli
3XXXX
4
Western & Southern – Maharashtra, Madhya Pradesh, Chhattisgarh
4XXXX
5
Southern region – Andhra Pradesh, Telangana, Karnataka
5XXXX
6
Southern region – tamil Nadu, Kerala, Puducherry, Lakshadweep
6XXXX
7
Eastern region – West Bengal, Orissa, Assam, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya
7XXXX
8
Eastern region – Bihar, Jharkhand
8XXXX
9
Western region – army postal service (APS) and functional usage
9XXXX
0
Reserved for Army postal service (APS) and special purposes
0XXXX
⚠️ Key Fact: The first digit of the PIN indicates the zone, the second digit indicates the sub-zone or postal circle, and the third digit indicates the sorting district. The last three digits specify the delivery post office within that district.
Why the Division into Zones Matters
Efficient Sorting & Delivery: Mail is first sorted by zone, then by sub-zone, then by district, and finally by the local post office.
Avoids Confusion: Similar place names (e.g., multiple “Rampur” or “Rajpur” in different states) are distinguished by unique PIN codes.
Integration with Technology: E-commerce, logistics, and courier services rely heavily on PIN codes for accurate delivery and tracking.
Disaster Management & Planning: PIN zones help government agencies plan regional postal services and resources efficiently.
Example of PIN Code Structure
PIN: 110001
1 → Northern Zone (Delhi, Haryana, Punjab, etc.)
10 → delhi Sorting District
001 → Specific delivery post office (Connaught Place, Delhi)
Summary
India has 9 official PIN code zones (1–9) plus the 0 zone for army postal Service, each covering a set of states or regions. The system ensures fast, accurate, and efficient postal service across the country.
Fun fact: Even after 50+ years, the PIN code system remains the backbone of India’s postal network and is now vital for e-commerce deliveries and government services.
Disclaimer:
The views and opinions expressed in this article are those of the author and do not necessarily reflect the official policy or position of any agency, organization, employer, or company. All information provided is for general informational purposes only. While every effort has been made to ensure accuracy, we make no representations or warranties of any kind, express or implied, about the completeness, reliability, or suitability of the information contained herein. Readers are advised to verify facts and seek professional advice where necessary. Any reliance placed on such information is strictly at the reader’s own risk.
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