In Thiruvallur district, Tamil Nadu, PIN code 631301 is anchored by Kadananagaram B.O, a Branch Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 6 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Kadananagaram B.O | BO | Branch Post Office |
| Mahankalikapuram B.O | BO | Branch Post Office |
| Thyagapuram B.O | BO | Branch Post Office |
| Ammavarikuppam S.O | SO | Sub Post Office |
| Balapuram B.O | BO | Branch Post Office |
| Chandravilasapuram B.O | BO | Branch Post Office |
