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689647 PINCode is located in Pathanamthitta district
| Post Offices with the same pin code as Oonnukal | |||
| No. | Post Office | District | Pincode |
| 1 | Mathur | Pathanamthitta | 689647 |
| 2 | Omalloor | Pathanamthitta | 689647 |
| 3 | Vazhamuttom | Pathanamthitta | 689647 |