Santander Bank, N.A. Branches Bank Name Santander Bank, N.A. Main Office 824 North Market Street, Suite 100, Wilmington, DE 19801 Browse by State Connecticut Delaware Florida Massachusetts New Hampshire New Jersey New York Pennsylvania Rhode Island Routing Number Checker Check out the ABA routing number to send a wire transfer or make an ACH. SWIFT Code Checker Find out the required swift code when making an international money transfer.