Find post office by pincode 821309 in district Rohtas in Bihar, India using online India Pincode finder tool. There are around 8 post offices in district Rohtas, Bihar, India with similar pincode 821309. All the post offices with pincode 821309 in Rohtas district of state Bihar are listed above. Finding post office location by pincode is very easy, simply click on any one of the post offices listed above to get its details. For example, if you want to know post office details of Amaura, just click on the post office name.