There are 4 post offices under PIN code 609405.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Alathur B.O | Branch Office | Delivery | Nannilam | Tiruvarur | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | Injikudi B.O | Branch Office | Non-Delivery | Nannilam | Tiruvarur | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Peralam S.O | Sub Office | Delivery | Nannilam | Tiruvarur | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Tirumeichur B.O | Branch Office | Delivery | Nannilam | Tiruvarur | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |