PIN code 421603 – Thane, Maharashtra

421603 is the PIN code of 2 post offices in Thane district, Maharashtra, served by the Bhatsanagar S.O sub office.

Post office	Type	Delivery	Division
Bhatsanagar S.OMap	Post office	Yes	Thane Division
Birwadi B.OMap	Branch office	Yes	Thane Division

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