how to tell if a number is a bank account number
This is how banks know what bank the check is drawn on. This number is always nine digits in the United States. The second set of numbers is the account number. The account number is followed by a symbol that looks like two short side-by-side vertical lines with a large dot to the upper right of the two short lines. Note that there is one number left; that matches the number in the upper right corner of the check. This is the check number.