Ullannur BO is the primary post office registered under PIN code 689503 in Pathanamthitta, Kerala. This code sits within the Southern Postal Region, with 7 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Ullannur BO | BO | Branch Post Office |
| Kulanada SO | SO | Sub Post Office |
| Chenneerkara BO | BO | Branch Post Office |
| Panangad BO | BO | Branch Post Office |
| Ulanad BO | BO | Branch Post Office |
| Kaipuzha North BO | BO | Branch Post Office |
| Manthuka BO | BO | Branch Post Office |
