PIN code 609111 belongs to Arappakkam B.O (Branch Post Office), located in Mayiladuthurai district, Tamil Nadu. It falls under the Southern Postal Region and is served by 8 post offices in total.
| Post office | Type | Full name |
|---|---|---|
| Arappakkam B.O | BO | Branch Post Office |
| Vilanthida Samudram B.O | BO | Branch Post Office |
| Sirkali Thenpathi S.O | SO | Sub Post Office |
| Sirkali West B.O | BO | Branch Post Office |
| Kovilpathu B.O | BO | Branch Post Office |
| Sirkali East B.O | BO | Branch Post Office |
| Tittai (SRK) B.O | BO | Branch Post Office |
| Nandhiynallur B.O | BO | Branch Post Office |
