A unique nine-digit number assigned to each banking institution, used to identify the bank and direct ACH debits and credits. The ABA routing number is usually found at the bottom of a personal or business check.
The is a unique number, located at the bottom of a check preceding the account number, which directs electronic ACH deposits to the correct bank.
The American Banking Association (ABA) routing number is a unique, bank-identifying number that directs electronic ACH deposits to the proper bank. This number consists of 9 digits and precedes the account number printed at the bottom of a check.