There are 10 post offices under PIN code 621651.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Alundalaipur B.O | Branch Office | Delivery | Lalgudi | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | Kallakudi TR S.O | Sub Office | Delivery | Lalgudi | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Kanakiliyanallur B.O | Branch Office | Delivery | Ariyalur | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Palanganatham B.O | Branch Office | Delivery | Ariyalur | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 5 | Peruvalappur B.O | Branch Office | Delivery | Ariyalur | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 6 | Sannavur B.O | Branch Office | Delivery | Lalgudi | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 7 | Sirukalappur B.O | Branch Office | Delivery | Ariyalur | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 8 | Tappay B.O | Branch Office | Delivery | Lalgudi | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 9 | Vadugarpet B.O | Branch Office | Delivery | Lalgudi | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 10 | Varakuppai B.O | Branch Office | Delivery | Ariyalur | Tiruchirappalli | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |