The Pin Code of Koolaiyar is 609113. Get more details along with the Pin Code of Koolaiyar. Koolaiyar is located in Nagapattinam district in Tamil Nadu. 609113 is the pincode (Postal code) of Koolaiyar.
| Location | Pincode | State | District |
| Koolaiyar | 609113 | Tamil Nadu | Nagapattinam |
| Location | Pincode | State | District |
| Tirumullaivasal | 609113 | Tamil Nadu | Nagapattinam |