There are 4 post offices under PIN code 600003.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Edapalayam S.O | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Madras Medical College S.O | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Park Town H.O | Head Office | Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Ripon Buildings S.O | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |