There are 5 post offices under PIN code 609602.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Dharmapuram B.O | Branch Office | Non-Delivery | Na | Karaikal | Nagapattinam | Tiruchy | Pondicherry | Tamilnadu |
| 2 | Karaikal Bazaar S.O | Sub Office | Non-Delivery | Na | Karaikal | Nagapattinam | Tiruchy | Pondicherry | Tamilnadu |
| 3 | Karaikal S.O | Sub Office | Delivery | Na | Karaikal | Nagapattinam | Tiruchy | Pondicherry | Tamilnadu |
| 4 | Karaikal South S.O | Sub Office | Non-Delivery | Na | Karaikal | Nagapattinam | Tiruchy | Pondicherry | Tamilnadu |
| 5 | Madagadi B.O | Branch Office | Non-Delivery | Na | Karaikal | Nagapattinam | Tiruchy | Pondicherry | Tamilnadu |