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Routing Number Generator

Routing Number Generator

Generate valid-format U.S. bank routing numbers instantly with Qodex’s Routing Number Generator. Whether you’re testing payment flows, simulating bank forms, or working in sandbox environments, this tool gives you quick and reliable output. Combine with the IBAN Generator, Credit Card Generator, or Token Generator to create full mock financial identities for development and QA.

Routing Number Generator - Documentation

Routing Number Generator


The Routing Number Generator by Qodex is a simple and efficient tool that creates random, Luhn-compliant U.S. bank routing numbers. Routing numbers are essential in identifying banks during domestic transfers within the U.S. and are often required in direct deposit, ACH, and wire transactions.


For developers and testers, using real routing numbers can trigger live API behavior or risk data integrity. This tool generates fake but format-valid routing numbers designed for safe use in non-production environments.Core Features and Benefits:


What is a Routing Number?


A routing number (also called an ABA or RTN) is a 9-digit code used in the United States to identify financial institutions during electronic transactions. It’s most commonly found on checks, direct deposit forms, and online banking portals.


Using dummy routing numbers for testing helps avoid unauthorized transactions while ensuring that your application’s logic, formatting, and error handling work correctly.


What does ABA stand for?


ABA stands for the American Bankers Association. This organization established the routing number standard back in 1910, which is why routing numbers are often referred to as “ABA numbers.” This system helps uniquely identify banks and credit unions throughout the U.S. Financial network, streamlining the process for various types of electronic payments and transfers.


Can a Bank Have More Than One Routing Number?


Absolutely—many major banks, like Chase, Bank of America, and Wells Fargo, use multiple routing numbers. Large financial institutions often assign different routing numbers based on region, account type, or the specific branch where an account was opened. For example, the routing number printed on your checks might differ from the one used for wire transfers or electronic payments. This approach helps banks manage transactions across a wide network and ensures smooth processing for their customers.


Do All Banks Use the Same Routing Number?


No—most major banks, including Chase, Bank of America, and Wells Fargo, actually use multiple routing numbers. The routing number assigned often depends on factors like the state where you opened your account, the type of transaction (ACH, wire, etc.), or even the specific branch. This system helps large banks efficiently manage high transaction volumes across different regions and services. For your testing and validation purposes, it’s useful to know that a single bank can have dozens of valid routing numbers in circulation.


Where to Find Routing and Account Numbers on a Check


If you’re looking at a typical U.S. Paper check, you’ll see a series of numbers along the bottom edge. The 9-digit routing number is usually the very first set of numbers on the left—this identifies the financial institution that issued the check, such as Chase, Wells Fargo, or Bank of America. Immediately following the routing number is your personal bank account number, which is unique to your account. The last group of numbers is the check number itself.


So, when you need to locate your routing number and account number for things like direct deposits or online payments, just glance at the lower edge of your check for these clearly printed codes.

Key Features and Benefits


  • Valid Format, Safe Output - All generated routing numbers follow the official 9-digit structure and pass the Luhn check for syntactic correctness.

  • Instant & Unlimited Generation - Click once to generate a new routing number. Repeat as needed—no sign-up or limits.

  • Ideal for QA & Payment Form Testing - Test scenarios like ACH setup, form field validation, or financial onboarding flows without using real bank data.

  • Developer-Friendly - Use in CI/CD pipelines, local dev environments, or fintech app staging servers. No risk of leaking sensitive financial info.

  • Integrates with Other Qodex Tools

    Pair with:


Example Output


Here are sample routing numbers the tool may generate:

  • 124003116

  • 021000021

  • 067012098


These numbers are for testing only and are not linked to real banks.


 How to Use

  1. Click the Generate button

  2. View the 9-digit routing number instantly

  3. Use the Copy button to paste it into your app, sandbox, or form

  4. Repeat for as many routing numbers as needed


Common Use Cases

Recommended Companion Tools:

Frequently Asked Questions

Are these routing numbers tied to real banks?

No, they’re randomly generated and not linked to any actual institution.

Are these routing numbers valid in the U.S. format?

Yes, they follow the correct ABA 9-digit structure with a valid check digit.

Can I use these numbers in a real transaction?

Absolutely not—these are for development and testing environments only.

Is this generator free to use?

Yes, QodexAI’s Routing Number Generator is completely free and requires no login or API key.

What tools should I use along with this?

Try pairing it with the Bank Account Generator or SWIFT Code Generator for full payment form simulations.

Can a Bank Have More Than One Routing Number?

Yes—many U.S. Banks have more than one routing number. Large institutions like Chase, Bank of America, and Wells Fargo often assign different routing numbers based on factors such as region, account type, or specific banking services (like wire transfers versus paper checks). It’s not just a quirk—these variations help banks efficiently route transactions across branches, state lines, and multiple banking products. If you're testing payment logic, keep in mind that not all routing numbers from a single bank will be interchangeable.

Where to Find Routing and Account Numbers on a Check

If you’re looking at a physical check from a U.S. Bank, you’ll notice a series of numbers printed across the bottom. The routing number is typically the first set of nine digits on the left, serving as the unique identifier for the financial institution. Immediately following this sequence is the account number, which links directly to the account holder. Both numbers are printed in magnetic ink (MICR) for easy processing—an approach you’ll see on checks from Chase, Bank of America, Wells Fargo, and other major banks. These numbers are crucial for setting up direct deposits, linking payment platforms, or initiating wire transfers—all without exposing actual funds during your tests.

Do major banks have more than one routing number?

Major banks like Chase, Bank of America, and Wells Fargo typically have multiple routing numbers. The specific routing number you use often depends on factors like the state, account type, or the type of transaction (for example, paper checks vs. Electronic payments). If you’re working with routing numbers in your integration or test data, it’s important to be aware that even within one institution, these codes can vary across regions and services. This is why using a generator is handy—it ensures your testing scenarios reflect the diversity of real-world banking data.

What does the account number identify?

While the routing number points to the financial institution handling a transaction, the account number uniquely identifies the specific individual account within that bank. Think of it as your unique address inside the bank—a sequence of digits that tells the institution exactly where to deposit or withdraw funds. This number works in tandem with the routing number, ensuring that money moves not just to the correct bank, but also to the correct account holder.

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