Kunnamthanam SO is the primary post office registered under PIN code 689581 in Pathanamthitta, Kerala. This code sits within the Southern Postal Region, with 4 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Kunnamthanam SO | SO | Sub Post Office |
| Manthanam BO | BO | Branch Post Office |
| Mundiappally BO | BO | Branch Post Office |
| Palackathakidi BO | BO | Branch Post Office |
