In Ramanathapuram district, Tamil Nadu, PIN code 623531 is anchored by Kothiyarkottai BO, a Branch Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 3 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Kothiyarkottai BO | BO | Branch Post Office |
| Sambai BO | BO | Branch Post Office |
| Tirupalaikudi SO | SO | Sub Post Office |
