A routing number is a numeric identifier used to direct a payment to a financial institution or processing endpoint within a payment network. Its format and use depend on the country and rail.
Where are routing numbers used?
In the United States, a nine-digit ABA routing number can be used for checks, ACH or wire instructions, although the correct number may differ by payment type. Other countries use different bank and branch codes.
Routing number vs. account number
The routing number identifies the financial institution or route. The account number identifies the receiving or sending account. Both must match the intended payment method.
Why can one bank have several routing numbers?
Banks may use different numbers by region, merger history, account type or payment rail. A number printed on a check may not be the correct wire-routing instruction.
How should routing details be verified?
Use official bank instructions or a trusted provider directory, confirm the payment type and validate changed beneficiary details independently. Do not rely solely on an emailed screenshot.
What happens when the number is wrong?
The payment may reject, route incorrectly or require repair. Keep the original instruction and provider response, and do not resend until the first transaction is resolved.
