PIN code 691021 – Kollam, Kerala

691021 is the PIN code of 2 post offices in Kollam district, Kerala, served by the Pattathanam SO sub office.

Post office	Type	Delivery	Division
Pattathanam SOMap	Post office	Yes	Quilon Division
Ayathil BOMap	Branch office	Yes	Quilon Division

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