PIN code 631212 belongs to Nallathur B.O (Branch Post Office), located in Thiruvallur district, Tamil Nadu. It falls under the Southern Postal Region and is served by 3 post offices in total.
| Post office | Type | Full name |
|---|---|---|
| Nallathur B.O | BO | Branch Post Office |
| Thalavedu B.O | BO | Branch Post Office |
| Poonimangadu S.O | SO | Sub Post Office |
