There are 15 post offices under PIN code 643217.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Donnington S.O | Sub Office | Non-Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 2 | Down Hills B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 3 | Farm Tea Estate B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 4 | Gundada B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 5 | Kaikatti B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 6 | Kannerimukku B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 7 | Kodanad B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 8 | Konavakorai B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 9 | Kotagiri Bazaar B.O | Branch Office | Non-Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 10 | Kotagiri S.O | Sub Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 11 | Kukalthorai B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 12 | Masakkal B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 13 | Milidane B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 14 | Nedugula B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |
| 15 | Nihung B.O | Branch Office | Delivery | Kotagiri | Nilgiris | Nilgiris | Coimbatore | Tamil Nadu | Tamilnadu |