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



The PIN system was introduced on 15 August 1972 by Shriram Bhikaji Velankar, an additional secretary in the Union Ministry of Communications.[1][2][3] 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.[4]

Postal zonesEdit

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

The first digit of the PIN is allocated over the 9 zones as follows:

PIN numberingEdit

Sorting districtEdit

2-digit postcode areas in India (defined through the first two PIN digits)

The first three digits of the PIN represent a specific geographical region (except in the case of the functional zone for the Army) 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 volume of mail handled.

PIN prefix ISO 3166-2:IN Zone
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 Uttar Pradesh and Uttarakhand
30 to 34 RJ Rajasthan
396210 DD Daman and Diu
396 DN Dadra and Nagar Haveli
36 to 39 GJ Gujarat
403 GA Goa
40 to 44 MH Maharashtra
45 to 48 MP Madhya Pradesh
49 CT Chhattisgarh
50 TG Telangana
51 to 53 AP Andhra Pradesh
56 to 59 KA Karnataka
605 PY Puducherry
60 to 66 TN Tamil Nadu
682 LD Lakshadweep
67 to 69 KL Kerala
737 SK Sikkim
744 AN Andaman and Nicobar Islands
70 to 74 WB West Bengal
75 to 77 OR Odisha
78 AS Assam
793 ML Meghalaya
795 MN Manipur
796 MZ Mizoram
797 to 798 NL Nagaland
799 TR Tripura
79 AR Arunachal Pradesh
80 to 85 BR, JH Bihar and Jharkhand
90 to 99 APS Army Postal Service
An example of a Postal Index Number

Service routeEdit

The fourth digit represents the route on which a delivery office is located in the sorting district.[4] This is 0 for offices in the core area of the sorting district.

Delivery officeEdit

A post box with its PIN marked on it

The last two digits represent the delivery office within the sorting district starting from 01 which would be the General Post Office (GPO) or head office (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.[5] Thus, two delivery offices situated next to each other will only have the first four digits in common.

Delivery systemEdit

Each PIN 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 a 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 (BOs) are located in rural areas and have limited postal services.[6]


  1. ^ Sometimes incorrectly written as "Pin code", "Pincode", "PINcode", or "pincode"


  1. ^ India. Publications Division, Ministry of Information and Broadcasting, Government of India. 1974. p. 305. Retrieved 17 May 2013.
  2. ^ "Mails section". Indian government postal department. Retrieved 17 May 2013.[dead link]
  3. ^ "Using pincode, maps to trace address". Archived from the original on 2016-10-05.
  4. ^ a b "Tamilnadu Postal Circle - Pincode". Archived from the original on 2014-07-20.
  5. ^ "Archived copy" (PDF). Archived (PDF) from the original on 2014-08-14. Retrieved 2014-08-14.CS1 maint: Archived copy as title (link)
  6. ^ "Archived copy" (PDF). Archived (PDF) from the original on 2014-05-30. Retrieved 2014-08-14.CS1 maint: Archived copy as title (link)

External linksEdit