Pincode 631209 is a 6-digit postal code serving 11 post offices in Thiruvallur district, Tamil Nadu. Tiruttanieast S.O is the Post Office for this area. The first digit ‘6’ identifies the Tamil Nadu postal region; the full code pinpoints the Thiruvallur delivery zone.
| Post Office | Type |
|---|---|
| Tiruttanieast S.O | Post Office |
| Tiruttani S.O | Post Office |
| Agooru B.O | Branch Post Office |
| Murukkambattu B.O | Branch Post Office |
| Netterikandigai B.O | Branch Post Office |
| Pattabiramapuram B.O | Branch Post Office |
| Srinivasapuram B.O | Branch Post Office |
| Suryanagaram B.O | Branch Post Office |
| Tirutani Hills B.O | Branch Post Office |
| Upper Tirutani B.O | Branch Post Office |
| Velanjeri B.O | Branch Post Office |
Data sourced from India Post, Department of Posts, Government of India. Data last verified: May 2026.