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