The Siwan postal district in Bihar covers 38 distinct PIN codes and 335 post offices operating across urban and rural delivery routes. Mail routing in this district connects through the Eastern Postal Region, coordinated via Siwan HO and local delivery branch offices.
Siwan district in Bihar currently has 38 unique PIN codes serving 335 post offices, which include 33 Sub Offices (SO) and 295 Branch Offices (BO).
Deliveries in Siwan fall under the Eastern Postal Region. Mail is sorted through district administrative hubs anchored by Siwan HO and routed to local sub and branch offices for delivery.
