PIN code 812004 belongs to Champanagar SO (Sub Post Office), located in Bhagalpur district, Bihar. It falls under the Eastern Postal Region and is served by 7 post offices in total.
| Post office | Type | Full name |
|---|---|---|
| Champanagar SO | SO | Sub Post Office |
| Fatehpur BO | BO | Branch Post Office |
| Ranuchakmakandpur BO | BO | Branch Post Office |
| Amribishapur BO | BO | Branch Post Office |
| Mirzapur BO | BO | Branch Post Office |
| Shankarpur BO | BO | Branch Post Office |
| Sahebganj | OTHER | post office |
