Post Office M. Kala B.o Pin Code In Sonbarsa State Bihar District Sitamarhi
| Post Office | M. Kala B.o |
| Division | Sitamarhi |
| Region | Muzaffarpur |
| Circle | Bihar |
| Taluka | Sonbarsa |
| District | Sitamarhi |
| State | Bihar |
| Phone | NA |
| Sub Office | Bhutahi S.O |
| Head Office | Sitamarhi H.O |
| Pincode | 843317 |
m. kala b.o branch pincode is 843317
m. kala b.o branch phone number is NA
m. kala b.o branch Head Office is Sitamarhi H.O