847301 is the PIN Code of Koilam, which is located in Darbhanga district, Bihar state.
Koilam Post Office is located at Koilam, Darbhanga of BIHAR state. It is a Branch Post Office. A Post Office (PO) / Dak Ghar is a facility in charge of sorting, processing, and delivering mail to recipients. POs are usually regulated and funded by the Government of India (GOI). Pin code of Koilam PO is 847301. This Postoffice falls under Darbhanga postal division of the Bihar postal circle.