Your routing number is in the bottom left corner of the check, printed as a nine-digit code
The routing number appears at the very start of the sequence of numbers along the bottom of a check. It comes before your account number and the check number. The nine digits identify which bank or credit union issued the check.
The numbers are printed in a special magnetic ink that machines can read automatically. This is why the routing number always appears in the same position on every check from the same bank — it makes processing faster and more reliable.
If you are looking at a check right now, start at the bottom left. The first nine-digit group you see is your routing number. It will be followed by a longer number (your account number) and then a shorter number (the check number). The format is always the same: routing number, then account number, then check number, all printed in that magnetic ink along the bottom edge.
Key Takeaways
- The routing number is the first nine-digit code at the bottom left of any check, before the account number.
- All checks from the same bank have the same routing number, even though account numbers differ.
- The routing number identifies your specific bank or credit union branch and is used to process deposits and transfers.
- If your check is damaged or the numbers are unclear, you can find the routing number on your bank's website or by calling the bank directly.
Why the routing number matters
The routing number tells the banking system where to send money. When someone deposits your check or when you set up a direct deposit, the routing number directs the funds to your specific bank or credit union. Without it, the payment cannot reach the right place.
You will need the routing number whenever you set up automatic bill payments, arrange a direct deposit from an employer, or transfer money between banks. It is also required if someone is sending you money via ACH transfer — the electronic system that moves money between accounts. The routing number is the address that tells the banking network which institution holds your account.
What to do if you cannot read the routing number
Checks can wear, fade, or get damaged in ways that make the numbers hard to read. If the routing number on your check is unclear, you have several straightforward options.
Call your bank's customer service line — the number is usually on the back of your debit card or on your bank's website. Tell them you need your routing number, and they will give it to you when ready. You can also log into your online banking account; most banks display the routing number in the account information section, often labeled as "routing number" or "ABA number."
Your bank's website usually has a routing number lookup tool. Enter your state and the name of your branch, and the system will return the nine-digit code. This takes less than a minute. Some banks also print the routing number on statements or in welcome materials that came with your account.
Routing numbers are not secret
Your routing number is not sensitive information in the way your account number or PIN is. It is printed on every check you write and is the same for all customers at your bank in a given region. Sharing your routing number alone does not put your account at risk.
However, someone who has both your routing number and your account number can set up unauthorized transfers or payments. Your account number is the sensitive piece. Never share your full account number with someone you do not trust, even if you have already given them the routing number. The routing number by itself is safe to share — it is the combination that matters.
Different banks, different routing numbers
Each bank and credit union has its own routing number, and large banks often have multiple routing numbers depending on the branch or region. If you have accounts at two different banks, each one will have a different routing number.
If you switch banks, your new bank will have a different routing number. This matters if you have set up automatic payments or direct deposits — you will need to update those with the new routing number so the money goes to the right place. When you close an old account and open a new one, make a list of all the places where you have automatic payments set up, then contact each one to provide the new routing and account numbers.
How routing numbers work in the banking system
The routing number is part of a standardized system that has been in place for decades. The nine digits are not random — they encode information about the bank's location and type. The first four digits identify the Federal Reserve district and the bank itself. The next four digits identify the specific branch. The final digit is a check digit that helps catch errors in transmission.
When a check is processed, machines read the routing number and account number in the magnetic ink at the bottom. The routing number tells the Federal Reserve which bank to send the check to, and the account number tells that bank which customer's account to credit. This system processes millions of checks every day.
Frequently Asked Questions
Can I use someone else's routing number to send them money?
Yes. If you are sending money to someone, you need their routing number and account number. You can get the routing number from one of their checks, ask them directly, or look it up on their bank's website. The routing number is not private information.
What if my checks show two different routing numbers?
This can happen if you have multiple accounts at the same bank or if your bank merged with another bank and issued new checks. Each account has its own routing number. Check which account the checks are drawn from — the routing number on that specific check is the correct one for that account.
Is the routing number the same on every check I write?
Yes, if all your checks are from the same account at the same bank. The routing number does not change from check to check. The only number that changes is the check number itself, which appears on the right side of the bottom line.
Do I need the routing number to cash a check?
No. When you cash a check at a bank or check-cashing service, they scan or read the routing number and account number automatically. You do not need to know or provide the routing number yourself — the teller or machine reads it from the check.