| Post office | Darwan B.O |
| Pin code | 821110 |
| Office type | B.O |
| Taluk / city | Mohania |
| District name | Kaimur (Bhabua) |
| State name | Bihar |
| Delivery status | Delivery |
| Division name | Rohtas |
| Region name | Patna HQ |
| Circle name | Bihar |
| Related sub office | Ramgarh S.O (Kaimur (Bhabua)) |
| Related head office | Sasaram H.O |
| Pincode | Post office name | City | District | State |
|---|---|---|---|---|
| 821110 | Chhotki Kulhariya B.O | Chainpur | Kaimur (Bhabua) | Bihar |
| 821110 | Kajura B.O | Chainpur | Kaimur (Bhabua) | Bihar |
| 821110 | Baraura B.O | Mohania | Kaimur (Bhabua) | Bihar |
| 821110 | Chhewari B.O | Mohania | Kaimur (Bhabua) | Bihar |
| 821110 | Darwan B.O | Mohania | Kaimur (Bhabua) | Bihar |
| 821110 | Dewhalia B.O | Mohania | Kaimur (Bhabua) | Bihar |
| 821110 | Jamurna B.O | Mohania | Kaimur (Bhabua) | Bihar |
| 821110 | Sahu Ka Mahua B.O | Mohania | Kaimur (Bhabua) | Bihar |
| 821110 | Jaldaha B.O | Nuaon | Kaimur (Bhabua) | Bihar |
| 821110 | Ramgarh S.O (Kaimur (Bhabua)) | Ramgarh | Kaimur (Bhabua) | Bihar |