ABA Routing Number™

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LexisNexis® Bankers Almanac® Routing Transit Number (RTN) File

LexisNexis® Risk Solutions is the official registrar of the ABA Routing Number™. A newly organized financial institution must complete and submit an application to LexisNexis Risk Solutions to be assigned its ABA Routing Number.

The American Bankers Association designated Bankers Almanac®, now part of LexisNexis Risk Solutions, as the registrar more than one hundred years ago. Today, it continues to serve as the official registrar of routing numbers in United States. In addition to its Registrar duties, LexisNexis Risk Solutions offers the Bankers Almanac® Routing Transit Number File which is a repository of ABA Routing Numbers. This file is available in Monthly or Daily delivery to keep pace with the rapid changes in the industry.

Inaccurate, incomplete, or missing Routing Transit Number information can cost an organization thousands of dollars every month. With the Bankers Almanac Routing Transit Number File, ACH users receive the most up-to-date data continuously, enhancing customer experience and operational efficiency.

This invaluable resource can help you process checks and return items, initiate wire transfers, pre-authorize drafts, and handle collections. In addition to listings of every active nine-digit Routing Number (approximately 22,000), you also get clearing system attributes (e.g. ACH transfer, Wire transfer). 

To order the Bankers Almanac Routing Transit File and other valuable banking products, contact us:

Address: 1000 Alderman Dr Alpharetta, GA, 30005-4101 United States 

Registrar email:
[email protected]

David Loor
Phone: +1 847 933 8148

Where is the ABA Routing Number on my checks?

You can find the ABA Routing Number at the bottom of your checks. The ABA Routing Number is the left-most number, followed by your account number, and then by the number of the check.

Who Is Eligible for an ABA Routing Number?

An ABA Routing Number can be issued only to a federal or state chartered financial institution which has been determined to be eligible for a master account by a Federal Reserve Bank. The assignment of a Routing Number does not expand or change in any way the powers of the financial institution as specified in its charter. For more details, see the entire Routing Number Policy. Once in receipt of the assigned Routing Number, the financial institution must actually be granted the master account at one of the twelve Federal Reserve Banks in order to have direct access to the Federal Reserve’s payment systems and to settle transactions with other participants in the central banking system.

Obtaining a Routing Number

LexisNexis Risk Solutions is the official registrar of ABA Routing Numbers. A newly organized financial institution must complete and submit an application to LexisNexis Risk Solutions to be assigned its ABA Routing Number. For additional details regarding the application process, contact:

Routing Number Registrar
LexisNexis Risk Solutions
1007 Church Street
Evanston, Illinois 60201
(800) 321-3373
(847) 933-8040 fax
[email protected]