In Idukki district, Kerala, PIN code 685601 is anchored by Kulamavu SO, a Sub Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 2 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Kulamavu SO | SO | Sub Post Office |
| Karippalangad BO | BO | Branch Post Office |
