| Post Office | Koilwar S.o |
| Division | Bhojpur |
| Region | Patna Hq |
| Circle | Bihar |
| Taluka | Arrah |
| District | Bhojpur |
| State | Bihar |
| Phone | 06182-282207 |
| Sub Office | NA |
| Head Office | Arrah H.O |
| Pincode | 802160 |
The koilwar s.o post office, situated in arrah Taluka of bihar district bhojpur, operates under the bhojpur Division. With its PIN code 802160, it connects to the NA and the Arrah H.O, ensuring efficient postal services. Located within the patna hq Region and the bihar Circle, this post office plays a crucial role in supporting communication and logistics in the area.
koilwar s.o branch pincode is 802160
koilwar s.o branch phone number is 06182-282207
koilwar s.o branch Head Office is Arrah H.O