There are 7 post offices under PIN code 600001.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Flower Bazaar S.O | Sub Office | Non-Delivery | Na | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Govt Stanley Hospital S.O | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Mannady S.O (Chennai) | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Mint Building S.O | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | MPT AO S.O | Sub Office | Non-Delivery | Tondiarpet Fort St Goerge | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Sowcarpet S.O | Sub Office | Non-Delivery | Tondiarpet Fort St George | Chennai | Chennai City North | Chennai Region | Tamil Nadu | Tamilnadu |
| 7 | Chennai G.P.O. | Head Office | Delivery | Chennai | Chennai | Chennai Gpo | Chennai Region | Tamil Nadu | Tamilnadu |