| Post office | Koilwan B.O |
| Pin code | 824115 |
| Office type | B.O |
| Taluk / city | Haspura |
| District name | Aurangabad(BH) |
| State name | Bihar |
| Delivery status | Delivery |
| Division name | Aurangabad(Bihar) |
| Region name | Patna HQ |
| Circle name | Bihar |
| Related sub office | Sihari S.O |
| Related head office | Aurangabad (BH) H.O |
| Pincode | Post office name | City | District | State |
|---|---|---|---|---|
| 824115 | Anurahi B.O | Kaler | Arwal | Bihar |
| 824115 | Dhamni B.O | Haspura | Aurangabad(BH) | Bihar |
| 824115 | Jhinguri B.O | Haspura | Aurangabad(BH) | Bihar |
| 824115 | Koilwan B.O | Haspura | Aurangabad(BH) | Bihar |
| 824115 | Sihari S.O | Haspura | Aurangabad(BH) | Bihar |
| 824115 | Sonhathu B.O | Haspura | Aurangabad(BH) | Bihar |