You can find the bank account number at the bottom of a check. A check features three numbers at the bottom, with the number located at the center being the account number at a customer’s bank, according to About.com.
The checking account number lies on the MICR, or magnetic ink character readable, line, according to Bankrate. It sits between the American Bankers Association number, the routing number that identifies the bank, and the check number. This format is applicable to personal checks, although customers should confirm the check number, as occasionally, some checks have a different format. Often, a ? symbol sits to the right of the account number and eases identification, advises About.com.