How Do You Look up an ABA Transit Number?

How Do You Look up an ABA Transit Number?

The American Bankers Association maintains an online search tool for consumers to look up ABA routing transit numbers. To look up an ABA number, the user enters a financial institution name and a state, at minimum. A city and a ZIP code help to refine the search.

To access the search tool, the user clicks a button to agree to the fact that she is accessing the tool for personal use only. Commercial access to the search tool is not free. A successful search returns an institution's address and its nine-digit ABA number. ABA numbers identify banks and other financial institutions for check processing, electronic funds transfers, online banking services and other purposes.