Find Postal Index Number(PIN) codes of India, Click any Town/Taluk below of District SIWAN ,State BIHAR
| # | Town/Taluk | Post Offices |
| 1 | ANDAR | 2 |
| 2 | BHAGWANPUR HAT | 5 |
| 3 | DARAUNDHA | 2 |
| 4 | GUTHANI | 1 |
| 5 | HASANPURA | 1 |
| 6 | LAKRI NABIGANJ | 3 |
| 7 | MAHARAJGANJ | 1 |
| 8 | MAIRWA | 1 |
| 9 | PACHRUKHI | 1 |
| 10 | SISWAN | 3 |
| 11 | SIWAN | 299 |
| 12 | SIWN | 1 |
| 13 | ZIRADEI | 3 |
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The postal system in India was Formed in 1 October 1854 under India Jurisdiction.Headquarters : Dak Bhawan, Sansad Marg, New Delhi
The Postal Index Number (PIN, or sometimes redundantly PIN code) is a six-digit postal code introduced on 15 August 1972. There are total of 19,101 PINs covering 154,725 post offices in India,
The PIN system is organised in the following way:
-The first digit indicates the zone.
-The first two digits indicate the sub-zone (or postal circle).
-The first three digits indicate a sorting district.
-The last three digits indicate the delivery post office.