When my Dad is trying to transfer me money from China to Canada, the receptionist at the Bank of China asked my Dad for what so called a "CC Code". I've been studying in Canada since 2017 and my parents have transferred me money for countless times, I've never been asked for this information. After a quick search, I know "Canadian Clearing Code (CC) is a 9-digit code made up of the 4-digit financial institution number followed by the 5-digit transit number where the account is held."(BMO)
But if you search for example, "RBC CC Code" or "Where can I find CC Code for RBC", you can't really find anything useful. Feel free to replace RBC with the bank you are using and you will probably find nothing useful.
How I found out what is CC Code is on reddit by this post. This very first comment has given the answer for my question. "From my understanding it's Insituition+transit number. I had to place a zero after my 3 digit institution code. Confirm with you bank though" With 14 upvotes, I accepted his answer gladly, and I told my Dad the CC Code I got. Since I ma using RBC, my institute number is 003, but to comply with the 9 digits rule, I will add one more 0 at the left side, which will make the CC Code looks like 0003Trans.(Replace Trans with your transit number) Your transit number is from the account number, the first five digits(before the hyphen) will be your transit number.
Online banking for business. (n.d.). https://bmocm.intelliresponse.com/olbb/en/?requestType=NormalRequest&interfaceID=9&source=4&id=1813&question=What+are+the+different+Bank+codes