There are 17 post offices under PIN code 621804.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Edayar B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 2 | Irumbilikurichi B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 3 | Kilaveli B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 4 | Kumiliam B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 5 | Managethi B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 6 | Nayanganaipiriyal B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 7 | Palayakudi B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 8 | Paranam B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 9 | Parukkal B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 10 | Pilichikuli B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 11 | T.Solankurichi B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 12 | Tattanur B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 13 | Udayarpalayam S.O (Ariyalur) | Sub Office | Delivery | Jayamkondcholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 14 | Udayarpalayam West B.O | Branch Office | Non-Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 15 | Vanathirayanpattinam B.O | Branch Office | Delivery | Jayamkondacholapuram | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 16 | Venmankondan B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |
| 17 | Zamin Suthamalli B.O | Branch Office | Delivery | Udayarpalayam | Ariyalur | Tiruchirapalli | Tiruchy | Tamil Nadu | Tamilnadu |