In Kollam district, Kerala, PIN code 690521 is anchored by Pallisserickal BO, a Branch Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 5 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Pallisserickal BO | BO | Branch Post Office |
| Karali Jn BO | BO | Branch Post Office |
| Venga BO | BO | Branch Post Office |
| Vilanthara Jn BO | BO | Branch Post Office |
| Sasthamcottah SO | SO | Sub Post Office |
