Postal Index Number

A Postal Index Number or PIN or PIN code[1] is a code in the post office numbering or post code system used by India Post, the Indian postal administration. The code is six digits long.


The PIN Code system was introduced on 15 August 1972 by Shriram Bhikaji Velankar, an additional secretary in the Union Ministry of Communications.[2][3][4] 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.[5]

Postal zones

There are nine PIN zones in India, including eight regional zones and one functional zone (for the Indian Army). The first digit of the PIN code indicates the region. The second digit indicates the sub-region, and the third digit indicates the sorting district within the region. The final three digits are assigned to individual post offices.

The 9 PIN zones cover the Indian states and union territories as follows:

PIN numbering

Sorting district

The first three digits of the PIN represent a specific geographical region called a sorting district that is headquartered at the main post office of the largest city and is known as the sorting office. A state may have one or more sorting districts depending on the volumes of mail handled.

PIN prefix ISO 3166-2:IN(Vehicle Code) Region
11 DL Delhi
12 to 13 HR Haryana(Kamania)
14 to 15 PB Punjab
16 CH Chandigarh
17 HP Himachal Pradesh
18 to 19 JK Jammu and Kashmir
20 to 28 UP, UT (UK) Uttar Pradesh and Uttarakhand
30 to 34 RJ Rajasthan
36 to 39 GJ Gujarat
403 GA Goa
40 to 44 MH Maharashtra
45 to 48 MP Madhya Pradesh
49 CT(CG) Chhattisgarh
50 TG(TS) Telangana
51 to 53 AP Andhra Pradesh
56 to 59 KA Karnataka
60 to 66 TN Tamil Nadu
67 to 69 KL Kerala
682 LD Lakshadweep (Islands)
70 to 74 WB West Bengal
737 SK Sikkim
744 AN Andaman and Nicobar Islands
75 to 77 OR(OD) Odisha
78 AS Assam
79 AR Arunachal Pradesh
793 ML Meghalaya
795 MN Manipur
796 MZ Mizoram
797 NL Nagaland
798 NL Nagaland
799 TR Tripura
80 to 85 BR, JH Bihar and Jharkhand
90 to 99 APS Army Postal Service
396210 DD Daman and Diu
396 DN Dadra and Nagar Haveli
605 PY Puducherry

Service route

The fourth digit represents the route on which a Delivery office is located in the sorting district.[5] This is 0 for offices in the core area of the sorting district.

Delivery office

The last two digits represent the delivery office within the sorting district starting from 01 which would be the GPO or HO. The numbering of the delivery office is done chronologically with higher numbers assigned to newer delivery offices. If the volume of mails handled at a delivery office is too large, a new delivery office is created and the next available PIN is assigned.[6] Thus two delivery offices situated next to each other will only have the first four digits in common. 781027

Delivery system

Each PIN code is mapped to exactly one delivery post office which receives all the mail to be delivered to one or more lower offices within its jurisdiction, all of which share the same code. The delivery office can either be a General Post Office (GPO), a Head Office (HO) or Sub Office (SO) which are usually located in urban areas. The post from the delivery office is sorted and routed to other delivery offices for a different PIN or to one of the relevant sub offices or branch offices for the same PIN. Branch offices (BO) are located in rural areas and have limited postal services.[7]


  1. Sometimes also written "PINcode" or "pincode".
  2. India. Publications Division, Ministry of Information and Broadcasting, Government of India. 1974. p. 305. Retrieved 17 May 2013.
  3. "Mails section". Indian government postal department. Retrieved 17 May 2013.
  4. "Using pincode, maps to trace address". Archived from the original on 2016-10-05.
  5. 1 2 "Tamilnadu Postal Circle - Pincode". Archived from the original on 2014-07-20.
  6. "Archived copy" (PDF). Archived (PDF) from the original on 2014-08-14. Retrieved 2014-08-14.
  7. "Archived copy" (PDF). Archived (PDF) from the original on 2014-05-30. Retrieved 2014-08-14.
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