There are 14 post offices under PIN code 638401.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Araipalayam B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 2 | Bannari B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 3 | Chikkarasampalayam B.O | Branch Office | Delivery | Sathy | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 4 | Dhimbam B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 5 | Germalam B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 6 | Hassanur B.O | Branch Office | Delivery | Sathy | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 7 | Ikkarainegamam B.O | Branch Office | Delivery | Sathy | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 8 | Komarapalayam-sathy B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 9 | Kottuveerampalayam B.O | Branch Office | Non-Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 10 | Puduvadavalli B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 11 | Sathy Bazaar S.O | Sub Office | Non-Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 12 | Sathyamangalam S.O | Sub Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 13 | Thingalur B.O | Branch Office | Delivery | Sathyamangalam | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |
| 14 | Varadampalayam B.O | Branch Office | Non-Delivery | Sathy | Erode | Tirupur | Coimbatore | Tamil Nadu | Tamilnadu |