Katki Bazar BO is the primary post office registered under PIN code 846004 in Darbhanga, Bihar. This code sits within the Eastern Postal Region, with 9 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Katki Bazar BO | BO | Branch Post Office |
| Darbhanga HO | HO | Head Post Office |
| Darbhanga City SO | SO | Sub Post Office |
| Darbhanga Bara Bazar SO | SO | Sub Post Office |
| Qadirabad BO | BO | Branch Post Office |
| C M College SO | SO | Sub Post Office |
| Darbhanga Chowk SO | SO | Sub Post Office |
| Kathalwari SO | SO | Sub Post Office |
| Kilaghat SO | SO | Sub Post Office |
