| Place | Post Code |
|---|---|
| Rewa Dih, Tirhut) | 843101 |
| Rupauli, Tirhut) | 843106 |
| Sadipur, Tirhut) | 843126 |
| Sarae Baya Urf Paharpur, Tirhut) | 843126 |
| Saraiya Factory, Tirhut) | 843126 |
| Saraiya Urf Bishunpur Kesho, Tirhut) | 843126 |
| Sarkeshpur, Tirhut) | 843101 |
| Serukahi, Tirhut) | 843123 |
| Shujawalpur, Tirhut) | 843126 |
| Sirkohia, Tirhut) | 843123 |
| Siroi Aima, Tirhut) | 843106 |
| Sohila Patti, Tirhut) | 843101 |
| Supna, Tirhut) | 844120 |
| Teja Dumri 12annas, Tirhut) | 843107 |
| Til Bihta, Tirhut) | 843126 |
| Tola Nawada, Tirhut) | 843123 |
| Udaipur, Tirhut) | 843101 |