PIN code 609504 belongs to Sannanallur S.O (Sub Post Office), located in Nagapattinam district, Tamil Nadu. It falls under the Southern Postal Region and is served by 3 post offices in total.
| Post office | Type | Full name |
|---|---|---|
| Sannanallur S.O | SO | Sub Post Office |
| Panangudi B.O | BO | Branch Post Office |
| Thuthukudi B.O | BO | Branch Post Office |
