Bank of America routing numbers are assigned by the American Bankers Association (ABA). The purpose of the routing number is to identify which bank a payment is to be drawn on. Bank of America routing numbers are dependent on where the account was opened, and the type of transaction being made. The different transactions include written checks, direct deposits and electronic transfers. Routing
. numbers are also known as check routing numbers, ABA numbers and Routing Transit numbers (RTN). www.bankofamerica.com/deposits/checksave/index.cfm?template=lc_faq_aba#