PIN code 631206 belongs to Madduru S.O (Sub Post Office), located in Thiruvallur district, Tamil Nadu. It falls under the Southern Postal Region and is served by 4 post offices in total.
| Post office | Type | Full name |
|---|---|---|
| Madduru S.O | SO | Sub Post Office |
| Krishnasamudram B.O | BO | Branch Post Office |
| Ramasamudram B.O | BO | Branch Post Office |
| Buchireddipalli B.O | BO | Branch Post Office |
