PIN Code Explained - What does the PINCODE (Postal Index Number) mean?

The Postal Index Number (PINCODE) is an important part of any address in India. But why is that important and how does it help the postal department? Here is making sense of the 6 digit PINCODE.

What does the PINCODE (Postal Index Number) mean? Why do the Postal Department & Courier firms ask you to write the PINCODE of the addressee? Why is it so important?

Postal Index Number (PIN) or PIN Code is a 6 digit code of Post Office numbering used by India Post. The PIN was introduced on August 15, 1972. There are 9 PIN regions in the country. The first 8 are geographical regions and the digit 9 is reserved for the Army Postal Service. The first digit indicates one of the regions. The second digit indicates the sub region or one of the postal circles (States). The third digit indicates a sorting / revenue district. The last 3 digits refer to the delivery Post Office.

The first digit of PIN indicates as below:

First Digit Region States Covered
1 Northern Delhi, Haryana, Punjab, Himachal Pradesh and Jammu & Kashmir
2 Northern Uttar Pradesh and Uttaranchal
3 Western Rajasthan and Gujarat
4 Western Maharashtra, Madhya Pradesh and Chattisgarh
5 Southern Andhra Pradesh and Karnataka
6 Southern Kerala and Tamil Nadu
7 Eastern West Bengal, Orissa and North Eastern
8 Eastern Bihar and Jharkand
9 APS Army Postal Service

The first 2 digits of PIN indicate as below:

First 2 Digits of PIN Circle
11 Delhi
12 and 13 Haryana
14 to 16 Punjab
17 Himachal Pradesh
18 to 19 Jammu & Kashmir
20 to 28 Uttar Pradesh and Uttaranchal
30 to 34 Rajasthan
36 to 39 Gujarat
40 to 44 Maharashtra
45 to 49 Madhya Pradesh and Chattisgarh
50 to 53 Andhra Pradesh & Telangana
56 to 59 Karnataka
60 to 64 Tamil Nadu
67 to 69 Kerala
70 to 74 West Bengal
75 to 77 Orissa
78 Assam
79 North Eastern
80 to 85 Bihar and Jharkand
90 to 99 Army Postal Service (APS)

Example Illustration

If the PINCODE is 500072, then 5 indicates Southern region & 50 indicates Telangana. 500 indicates the district of Rangareddy/Hyderabad and the last 3 digits (072) indicate the KPHB colony post office in this area. That is how the postal department sorts the incoming mails and routes them to the correct post office.

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