There are 7 post offices under PIN code 621851.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Aranmanaikurichi B.O | Branch Office | Delivery | Ariyalur | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | Ilandaikudam B.O | Branch Office | Delivery | Lalgudi | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Kandirathitham B.O | Branch Office | Delivery | Lalgudi | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Koilesanai B.O | Branch Office | Delivery | Lalgudi | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 5 | Pudukkottai-Tirumalaivadi B.O | Branch Office | Delivery | Ariyalur | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 6 | Thirumazhapadi S.O | Sub Office | Delivery | Lalgudi | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 7 | Venganur B.O | Branch Office | Delivery | Lalgudi | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |