National Bank Routing Numbers

National Bank Routing Number: National Bank is one of the largest Bank in US and have it's branches in different states and cities of United States. Routing Number is a 9-digit identification number assigned to financial institutions by The American Bankers Association (ABA) used in the United States, it checks and identify the financial institution on which it was drawn. Routing numbers will be different based on the account branch. It is based on the bank account origin by state and region. You can get all details about National Bank along with routing number, bank address, phone number, zip etc. by clicking on the National Bank branch below. You can also filter your search by selecting the state from the below filter.