821103 is the PIN Code of Biur, which is located in Kaimur (bhabua) district, Bihar state.
Biur Post Office is located at Biur, Kaimur (Bhabua) 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 Biur PO is 821103. This Postoffice falls under Rohtas postal division of the Bihar postal circle.