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About Routing Transit Numbers

A routing transit number (RTN), routing number, or ABA number is a nine digit bank code, used in the United States, which appears on the bottom of negotiable instruments such as checks identifying the financial institution on which it was drawn. This code is also used by Federal Reserve Banks to process Fedwire funds transfers and by the Automated Clearing House to process direct deposits and other automated transfers. The routing number is derived from the bank's transit number originated by the American Bankers Association, which designed it in 1910.

Since 1911, the American Bankers Association has assigned transit numbers through a series of registrars, currently Accuity. The company is responsible for assigning new ABA numbers. Accuity publishes the ABA Number Directory in the American Bankers Association Key to Routing Numbers semi-annually.

There are approximately 28,000 active routing and transit numbers currently in use. Every financial institution in the United States has at least one of these.

This data was last updated from the Federal Reserve on 09-04-2010 05:00:10 PM CDT

If you are not certain about which routing number to use, please contact your bank directly
NOTE: Bank addresses are the delivery addresses for the processing facilities
(not necessarily the address of your branch).
Additionally, these RTN are for ACH purposes, for Checks they could be different.

Online resources

This data was retrieved from the Federal Reserve at

• http://www.fededirectory.frb.org/download.cfm 

The routing numbers are generated by

• http://www.accuitysolutions.com 

The routing number was developed by

• http://www.aba.com/