There are 7 post offices under PIN code 603111.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Mamandur B.O | Branch Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Manapakkam B.O | Branch Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Meyyur B.O | Branch Office | Delivery | Maduranthakam | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Ozhalur B.O | Branch Office | Delivery | Tirukalikundram | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Pazhamathur B.O | Branch Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Tirumani B.O | Branch Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 7 | Venpakkam S.O | Sub Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |