Kotak Mahindra Bank IFSC Code MUMBAI - SION (W) Branch in MUMBAI can be used for internet banking for transferring funds between any two bank branches. This is IFSC Code for Kotak Mahindra Bank MUMBAI - SION (W) Branch in MUMBAI allocated by RBI. Before using this MUMBAI - SION (W) Branch MUMBAI Kotak Mahindra Bank IFSC Code, kindly cross check the respective bank website. This Kotak Mahindra Bank MUMBAI - SION (W) Branch IFSC Code in MUMBAI supporting net banking has its unique IFSC code. MUMBAI - SION (W) Branch MUMBAI Kotak Mahindra 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.