PIN code 686121 – Kottayam, Kerala

686121 is the PIN code of 2 post offices in Kottayam district, Kerala, served by the Erattupetta SO sub office.

Post office	Type	Delivery	Division
Erattupetta SOMap	Post office	Yes	Kottayam Division
Nadackal BOMap	Branch office	Yes	Kottayam Division

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