In Chengalpattu district, Tamil Nadu, PIN code 603110 is anchored by Illalur BO, a Branch Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 5 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Illalur BO | BO | Branch Post Office |
| Kayar BO | BO | Branch Post Office |
| Venbedu BO | BO | Branch Post Office |
| Alathur Industrial Estate BO | BO | Branch Post Office |
| Tiruporur SO | SO | Sub Post Office |
