| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Piprakhurd, Kosi) | 852105 |
| Postal/ZIP Codes in Raharia, Kosi) | 852105 |
| Postal/ZIP Codes in Ramnagar, Kosi) | 852108 |
| Postal/ZIP Codes in Sadanandpur, Kosi) | 852105 |
| Postal/ZIP Codes in Saraigarh, Kosi) | 852105 |
| Postal/ZIP Codes in Saraigarh Bhaptiyahi, Kosi) | 852105 |
| Postal/ZIP Codes in Shahpur Pirthipatti, Kosi) | 852111 |
| Postal/ZIP Codes in Simri, Kosi) | 852215 |
| Postal/ZIP Codes in Siyana, Kosi) | 852105 |
| Postal/ZIP Codes in Sonbarsa, Kosi) | 852138 |
| Postal/ZIP Codes in Sonpataha, Kosi) | 852105 |
| Postal/ZIP Codes in Sukhasan, Kosi) | 852138 |
| Postal/ZIP Codes in Takia, Kosi) | 852215 |
| Postal/ZIP Codes in Uganipatti, Kosi) | 852215 |