| Name | Pincode | Taluk | District | Phone No. |
| Chennai G.P.O. | 600001 | Chennai | Chennai | 044-25216766 |
| Flower Bazaar S.O | 600001 | | Chennai | |
| Govt Stanley Hospital S.O | 600001 | Tondiarpet Fort St George | Chennai | 044-25284016 |
| Mannady S.O (Chennai) | 600001 | Tondiarpet Fort St George | Chennai | 044-25244357 |
| Mint Building S.O | 600001 | Tondiarpet Fort St George | Chennai | 044-25200635 |
| MPT AO S.O | 600001 | Tondiarpet Fort St Goerge | Chennai | 044-25383018 |
| Sowcarpet S.O | 600001 | Tondiarpet Fort St George | Chennai | 044-25292370 |
| Anna Road H.O | 600002 | Chennai | Chennai | 044-28520926 |
| Chintadripet S.O | 600002 | Chennai | Chennai | 044-28455313 |
| Madras Electricity System S.O | 600002 | Chennai | Chennai | 044-28520590 |
| Edapalayam S.O | 600003 | Tondiarpet Fort St George | Chennai | 044-25330151 |
| Madras Medical College S.O | 600003 | Tondiarpet Fort St George | Chennai | 044-25364272 |
| Park Town H.O | 600003 | Tondiarpet Fort St George | Chennai | 044-25340651 |
| Ripon Buildings S.O | 600003 | Tondiarpet Fort St George | Chennai | 044-25615680 |
| Mandaveli S.O | 600004 | Chennai | Chennai | 044-24641298 |
| Mylapore H.O | 600004 | Chennai | Chennai | 044-24642805 |
| Vivekananda College Madras S.O | 600004 | Chennai | Chennai | 044-24642805 |
| Chepauk S.O | 600005 | Chennai | Chennai | 044-28583200 |
| Madras University S.O | 600005 | Chennai | Chennai | 044-25362950 |
| Tiruvallikkeni S.O | 600005 | Chennai | Chennai | 044-28517941 |
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