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Routing numbers were developed by the American Bankers Association (ABA) in 1910. Each number is unique to one financial institution. But one bank may have multiple routing numbers, determined by factors like the region where the account is opened.
The routing number is the nine-digit number associated with financial institutions and may also be referred to as an ABA#. The number is usually located in the bottom left corner of a check. You can also find your financial institutions routing number by visiting their website or logging into your accounts to find the routing number / ABA#. Don’t confuse your account number for the routing number.