CitizensUrban Co Op Bank Ltd branches in Gangtok: Get the list of CitizensUrban Co Op Bank Ltd MICR codes in Gangtok which are made available by Branch. Gangtok MICR code is a character-recognition technology used mainly by the banking industry to ease the processing and clearance of cheques and other documents. Gangtok MICR code has 9 digits first three digits are Gangtok City Code, second three digits are Gangtok bank code and last three are Gangtok branch code.