In Chengalpattu district, Tamil Nadu, PIN code 603401 is anchored by Puthirankottai BO, 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 |
|---|---|---|
| Puthirankottai BO | BO | Branch Post Office |
| Andarkuppam BO | BO | Branch Post Office |
| Velur BO | BO | Branch Post Office |
| Vannianallur BO | BO | Branch Post Office |
| Chunampet SO | SO | Sub Post Office |
| Kadukkalur BO | BO | Branch Post Office |
