The routing number on a check is the nine-digit code printed on the bottom left corner. It identifies which bank or credit union the check is drawn on, and you’ll need it whenever you set up direct deposit, schedule a wire transfer, or link a bank account to a payment app.
Where to Find It on a Paper Check
Flip your check over so the front faces you and look at the string of numbers along the bottom edge. You’ll see three groups of numbers, reading left to right:
- Routing number (first nine digits): This is your bank’s unique identifier within the U.S. banking system. It’s often bracketed by small symbols that look like colons or vertical lines.
- Account number (middle group): This identifies your specific checking account at that bank. The length varies by institution, typically between 8 and 12 digits.
- Check number (last group): This matches the number printed in the upper right corner of the check.
If you’re unsure which group is which, count the digits. The routing number is always exactly nine digits. Your account number and check number will differ in length depending on your bank.
What the Nine Digits Mean
A routing number isn’t random. The first four digits indicate the Federal Reserve district and processing center assigned to the bank. The next four identify the specific financial institution. The final digit is a mathematical check digit that helps automated systems catch typos. This structure, formally called an ABA routing transit number, was created by the American Bankers Association and has been in use for over a century. LexisNexis Risk Solutions serves as the official registrar of all ABA routing numbers in the United States.
Finding Your Routing Number Without a Check
If you don’t have a checkbook handy, there are several other ways to get the number:
- Online banking or mobile app: Log in and look under account details. Most banks display the routing number on the same screen as your account number and balance.
- Bank’s website: Many banks list their routing numbers on a help or FAQ page. Search the site for “routing number” and you’ll usually find it quickly.
- Bank statement: Some monthly statements, whether paper or electronic, print the routing number near the top alongside your account number.
- ABA’s online lookup tool: The American Bankers Association hosts an official routing number lookup on its website (aba.com). You can search by bank name or enter a nine-digit number to verify which institution it belongs to.
- Call your bank: Customer service can confirm the correct routing number for your account type and region in a few seconds.
Why One Bank Might Have Multiple Routing Numbers
Large banks that operate across many regions often have more than one routing number. The number assigned to your account typically depends on where you opened it or which state you lived in at the time. If your bank has merged with another institution over the years, your routing number may have changed as well. This is why it’s worth confirming the number directly from your account details rather than relying on a generic search. Using the wrong routing number can delay or misdirect a payment.
When You’ll Need a Routing Number
You’ll be asked for your routing number more often than you might expect. Setting up direct deposit with an employer requires both the routing number and your account number. The same pair of numbers is needed to schedule automatic bill payments, send or receive ACH transfers (the electronic system banks use to move money between accounts), initiate a wire transfer, or link your checking account to apps like Venmo or PayPal. Tax refunds deposited electronically also require a routing number.
For domestic ACH transfers and direct deposits, the standard nine-digit ABA routing number is what you need. Wire transfers sometimes use a different routing number at the same bank, so if you’re wiring money, confirm with your bank that you have the correct one for that specific transaction type.
How to Verify a Routing Number
If someone gives you a routing number and you want to make sure it’s legitimate before sending money, use the ABA’s official lookup tool at aba.com. Enter the nine-digit number and the tool will return the name and location of the associated bank. If nothing comes back, the number is either incorrect or no longer active. You can also call the bank directly and ask them to confirm the number matches their institution.