There are 10 post offices under PIN code 621104.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Bommanapadi B.O | Branch Office | Delivery | Perambalur | Perambalur | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | C.Mavilingai B.O | Branch Office | Delivery | Kunnam | Perambalur | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Chathiramanai B.O | Branch Office | Delivery | Perambalur | Perambalur | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Chettikulam S.O | Sub Office | Delivery | Kunnam | Perambalur | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 5 | Kilakanavai B.O | Branch Office | Delivery | Perambalur | Perambalur | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 6 | Nattarmangalam B.O | Branch Office | Delivery | Kunnam | Perambalur | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 7 | Perahambi B.O | Branch Office | Delivery | Manachanallur | Tiruchirappalli | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 8 | Shanamangalam B.O | Branch Office | Delivery | Manachanallur | Tiruchirappalli | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 9 | T.Valaiyur B.O | Branch Office | Delivery | Manachanallur | Tiruchirappalli | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |
| 10 | Velur B.O | Branch Office | Delivery | Manachanallur | Tiruchirappalli | Srirangam | Tiruchy | Tamil Nadu | Tamilnadu |