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689674 PINCode is located in Pathanamthitta district
| Post Offices with the same pin code as Oonnakavu | |||
| No. | Post Office | District | Pincode |
| 1 | Angadi (pathanamthitta) | Pathanamthitta | 689674 |
| 2 | Nellikkamon | Pathanamthitta | 689674 |
| 3 | Pulloopram | Pathanamthitta | 689674 |