| Term | Definition |
|---|---|
| ABA Transit Routing Number, also Route Transit Number (RTN) |
An ABA transit number (also known as a route transit number, RTN, or simply a routing number) is a nine-digit bank code identifying a particular financial institution. These numbers appear on most checks and are also used in automated clearinghouse (ACH) transactions. The combination of the ABA transit number and the account number allows a specific account to be quickly identified. |
