There are 8 post offices under PIN code 609111.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Arappakkam B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | Koilthirukolakkal B.O | Branch Office | Non-Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Kovilpathu B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Sirkali East B.O | Branch Office | Non-Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 5 | Sirkali Thenpathi S.O | Sub Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 6 | Sirkali West B.O | Branch Office | Non-Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 7 | Tittai (SRK) B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |
| 8 | Vilanthida Samudram B.O | Branch Office | Delivery | Sirkali | Nagapattinam | Mayiladuthurai | Tiruchy | Tamil Nadu | Tamilnadu |