| Place | Post Code |
|---|---|
| Ramnagar, Tirhut) | 843302 |
| Rampur Gangauli, Tirhut) | 843327 |
| Rewasi Maksudpur, Tirhut) | 843327 |
| Riga, Tirhut) | 843327 |
| Sankhi, Tirhut) | 843302 |
| Shahbazpur, Tirhut) | 843327 |
| Simri, Tirhut) | 843327 |
| Sirahi, Tirhut) | 843327 |
| Sirauli, Tirhut) | 843302 |
| Sonar, Tirhut) | 843327 |