In Pathanamthitta district, Kerala, PIN code 689645 is anchored by Makkankunnu 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 |
|---|---|---|
| Makkankunnu SO | SO | Sub Post Office |
| Pathanamthitta HO | HO | Head Post Office |
