UNITED STATES / ABA ROUTING CHECKER
Nine digits.
A clearer check.
Check the length, recognised prefix and check digit. Where a number appears in our selected bank references, see its published payment use.
Format reference: American Bankers Association · Sources & coverage
READING THE NUMBER
Routing details, broken down.
The first four digits form the Federal Reserve routing symbol, the next four identify the institution, and the last is a check digit. The checksum helps detect typing errors in the routing number.
GOOD TO KNOW
A few useful answers.
What does a passing result mean?
The entry has nine digits, uses a recognised prefix series and satisfies the ABA weighted checksum. Matching bank records appear below the format result.
What if the format passes but no bank is found?
Format validation and bank lookup are separate checks. The bank lookup searches the selected institutions listed in our routing-number directory.
Why is the first zero important?
Routing numbers are identifiers, not ordinary quantities. A leading zero is part of the nine-digit value. Copy all nine digits exactly as supplied by the bank.
Does this checker send or save my entry?
No. Checking and matching happen in your browser. The tool does not put your entry in a URL, call an external validation service, or save it in browser storage. Opening a public routing-number reference page is a separate action.
Can this find the account holder or bank balance?
No. Routing numbers identify institutions or routing arrangements. They contain no account-holder name, private account number, or balance information.
THE DETAILS, EXPLAINED
A little context goes a long way.
IBAN, SWIFT, and routing numbers
Different identifiers. Different jobs. Learn which details belong in which field.
02 / PAYMENT GUIDESSEPA or SWIFT?
Understand the difference between a euro payment scheme and a global messaging network.
03 / PAYMENT GUIDESFollow a missing transfer
The references and questions that can help your bank investigate.