| Post office | Koolaiyar B.O |
| Pin code | 609113 |
| Office type | B.O |
| Taluk / city | Sirkali |
| District name | Nagapattinam |
| State name | Tamil Nadu |
| Delivery status | Delivery |
| Division name | Mayiladuthurai |
| Region name | Tiruchy |
| Circle name | Tamilnadu |
| Related sub office | Tirumullaivasal S.O |
| Related head office | Sirkali H.O |
| Pincode | Post office name | City | District | State |
|---|---|---|---|---|
| 609113 | Koolaiyar B.O | Sirkali | Nagapattinam | Tamil Nadu |
| 609113 | Tirumullaivasal S.O | Sirkali | Nagapattinam | Tamil Nadu |