| Place | Post Code |
|---|---|
| Semri, Tirhut) | 845452 |
| Semri Bhawanipur, Tirhut) | 845452 |
| Sihpatti, Tirhut) | 845452 |
| Sikta Kalan, Tirhut) | 845452 |
| Sikta Khurd, Tirhut) | 845452 |
| Sirsia, Tirhut) | 845452 |
| Siswa Bairagi, Tirhut) | 845452 |
| Siswa Bhuinhar, Tirhut) | 845452 |
| Siswania, Tirhut) | 845452 |
| Sonbarsa, Tirhut) | 845452 |