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691531 PINCode is located in Kollam district
| Post Offices with the same pin code as Extension trg centre | |||
| No. | Post Office | District | Pincode |
| 1 | Karikkom | Kollam | 691531 |
| 2 | Kizhakketheruvu | Kollam | 691531 |
| 3 | Plappally | Kollam | 691531 |
| 4 | Pulamon | Kollam | 691531 |
| 5 | Sadanandapuram | Kollam | 691531 |
| 6 | Thrikkannamangal | Kollam | 691531 |