The ABA routing number is a 9-digit identification number assigned to financial institutions by The American Bankers Association (ABA). This number identifies the financial institution upon which a payment is drawn. Routing numbers are sometimes referred to as "check routing numbers", "ABA numbers", or "routing transit numbers" (RTN). Routing numbers may differ depending on where your account was opened and the type of transaction made.
>What is an ABA routing number?
The ABA routing number is a 9-digit identification number assigned to financial institutions by The American Bankers Association (ABA). This number identifies the financial institution upon which a payment is drawn. Routing numbers are sometimes referred to as "check routing numbers", "ABA numbers", or "routing transit numbers" (RTN). Routing numbers may differ depending on where your account was opened and the type of transaction made.
https://www.bankofamerica.com/deposits/manage/faq-routing-nu...