Routing numbers are nine digit numbers that can also be referred to as bank routing numbers, routing transit numbers and ABA numbers. This code identifies your financial institution and it can differ depending on where you opened your account and type of transaction you make. There’s a number of ways you can find your Account/Bank Routing number. On your paper checks, your account number and bank (ABA) routing number can be found at the bottom of your checks. The other methods require confirmation with your financial institution.