PIN code 689531 – Pathanamthitta, Kerala

689531 is the PIN code of 2 post offices in Pathanamthitta district, Kerala, served by the Koipuram SO sub office.

Post office	Type	Delivery	Division
Koipuram SOMap	Post office	Yes	Tiruvalla Division
Poovathoor BOMap	Branch office	Yes	Tiruvalla Division

Source: India Post PIN code directory (Open Government Data). Branch offices usually get mail through their sub or head office.