PIN code 623503 – Ramanathapuram, Tamil Nadu

623503 is the PIN code of 2 post offices in Ramanathapuram district, Tamil Nadu, served by the Ramanathapuram Collectorate SO sub office.

Post office	Type	Delivery	Division
Ramanathapuram Collectorate SOMap	Post office	Yes	Ramanathapuram Division
Pattanamkathan BOMap	Branch office	Yes	Ramanathapuram Division

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