Routing number lookup
Enter a nine-digit routing number to see which bank or credit union holds it, whether it is still active, and where it is headquartered. The lookup checks the number's ABA checksum first.
Spaces and hyphens are ignored. The number is the nine digits at the bottom left of a check.
What a routing number is
A routing number, also called an ABA number or routing transit number (RTN), is a nine-digit code that identifies a U.S. financial institution in the payment system. ACH transfers, wires and paper checks use it to find the bank that holds your account. The routing number names the bank. Your account number names your account at that bank.
How to read the nine digits
The first eight digits identify the institution. The ninth is a check digit, chosen so the whole number passes the checksum below.
How the checksum works
Multiply digits 1, 4 and 7 by 3, digits 2, 5 and 8 by 7, and digits 3, 6 and 9 by 1. Add the nine results. A valid routing number gives a total that is a multiple of 10.
Worked example with 021000021:
Products: 0, 14, 1, 0, 0, 0, 0, 14, 1. Their sum is 30, a multiple of 10, so the number passes. A single mistyped digit changes the sum and usually fails the test. One in ten random errors still passes, so a passing checksum shows a number is well formed, not that it belongs to the bank you expect.
Retired and merged numbers
The lookup keeps closed institutions. A number from a bank that merged, failed or closed returns that institution with its status, and a merged bank links to the institution that took it over. We hold the primary routing number on each National Information Center record, so a number an institution used but the record does not list as primary will not match.
Browse the bank directory, browse credit unions, or see routing numbers by bank. For definitions of other bank IDs, read bank identifiers explained.
Routing number questions, answered
What is a routing number?
A routing number, also called an ABA number or routing transit number (RTN), is a nine-digit code that identifies a U.S. financial institution in the payment system. ACH transfers, wires and paper checks use it to find the bank that holds the account.
How can I tell if a routing number is valid?
Run the ABA checksum. Multiply digits 1, 4 and 7 by 3, digits 2, 5 and 8 by 7, and digits 3, 6 and 9 by 1, then add the results. A valid number gives a total that is a multiple of 10. A passing checksum only shows the number is well formed. It does not prove the number belongs to a particular bank.
Why does a routing number not appear in this lookup?
This lookup reads the primary routing number on each institution's National Information Center record. A number that passes the checksum but is not found may be a secondary or wire-only number, may belong to an institution we do not carry, or may be a typing error that happens to pass the checksum. Confirm with the bank before you send money.
Can a bank have more than one routing number?
Yes. Many banks hold several routing numbers, for example separate numbers for ACH and wires, or numbers inherited in a merger. This lookup matches the primary number on record for each institution.