There are 11 post offices under PIN code 609101.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Achalpuram S.O | Sub Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | Alakkudi B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Arapallam B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Kodakkaramoolai B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 5 | Kothandapuram B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 6 | Mahendrapalli B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 7 | Palayapalayam B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 8 | Palayar B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 9 | Pudupattinam B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 10 | Puliyanthurai B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 11 | Thandavankulam B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |