Routing Number Validator

An ABA Routing Number is a nine-digit code that helps identify banks in the United States. It ensures that money transfers, like direct deposits or bill payments, reach the right bank.

The code was introduced by the American Bankers Association (ABA) to make sure transactions are secure and accurate, and each bank has its own unique routing number to avoid mix-ups.

An example of a valid ABA Routing Number is 011000138. This routing number belongs to Bank of America in Henrico, Virginia.

ABA Routing Numbers use a check digit to allow determining whether a routing number is valid or not.

To use the Routing Number Validator, choose whether to validate a single routing number or multiple routing numbers in bulk.

If you're validating a single routing number, enter the number in the input field and you will automatically get the validation result.

For bulk validation, enter multiple routing numbers separated by commas, semicolons, or line breaks. Click the 'Validate' button to check all the routing numbers at once.

The Routing Number Validator uses a check digit algorithm to validate ABA Routing Numbers. This algorithm checks the structure of the routing number and verifies that it meets the requirements for a valid routing number.

However, note that the actual existence of a bank or financial institution with that routing number is not verified by this tool. It only checks the format and structure of the routing number.

To manually verify a U.S. routing number:

1. 1. Check the length: Ensure the routing number contains exactly 9 digits.
2. 2. Validate the syntax: Confirm that the routing number consists only of numeric digits.
3. 3. Perform a checksum calculation using the ABA routing number algorithm:

- Multiply the digits in positions 2, 5, and 8 by 7.

- Add the digits in positions 3, 6, and 9 as they are.

- Compute the total sum of these weighted values.

- Verify that the total is divisible by 10 (i.e., the remainder when divided by 10 is 0).

If all these conditions are met, the routing number is valid.

The Routing Number Validator does not provide the bank name associated with a routing number. It focuses on validating the routing number itself based on the check digit algorithm.

If you need to find the bank name associated with a routing number, you can use the ABA Routing Number lookup tool provided by the American Bankers Association.

Among others, the Routing Number Validator is ideal for:

1. 1. Verifying bank account information: Ensure that routing numbers are correct before processing transactions.
2. 2. Preventing errors: Avoid issues like failed direct deposits or bill payments due to incorrect routing numbers.
3. 3. Cleaning up data: Validate routing numbers in bulk to clean up databases, CRM data, Excel spreadsheets or other lists containing bank account information.
4. 4. Compliance: Ensure that routing numbers meet the required format for financial transactions.