HDFC Bank IFSC Code SIWAN - BIHAR Branch in SIWAN can be used for internet banking for transferring funds between any two bank branches. This is IFSC Code for HDFC Bank SIWAN - BIHAR Branch in SIWAN allocated by RBI. Before using this SIWAN - BIHAR Branch SIWAN HDFC Bank IFSC Code, kindly cross check the respective bank website. This HDFC Bank SIWAN - BIHAR Branch IFSC Code in SIWAN supporting net banking has its unique IFSC code. SIWAN - BIHAR Branch SIWAN HDFC Bank IFSC Code is a unique code which helps to identity the bank location too. NOTE that only those branches of a bank which are approved by RBI can provide net transfer systems.