Your routing number is printed on the bottom left of every check you write
The routing number is the nine-digit code that identifies your bank to the financial system. On a paper check, it appears in the bottom left corner, before your account number. It looks like this: the first set of numbers on that bottom line, separated by a colon or special symbol from the account number that follows it.
If you do not have checks in front of you, your routing number is also available through your bank's website, your mobile app, or by calling the customer service number on the back of your debit card. You do not need to visit a branch.
The routing number stays the same for your bank, regardless of which branch you use or how many accounts you have there. If you move to a different bank, you get a different routing number.
Key Takeaways
- Your routing number appears in the bottom left corner of any check, as the first set of nine digits before your account number.
- You can find your routing number on your bank's website, in your mobile app, or by calling customer service without visiting a branch.
- The routing number identifies your specific bank, not your individual account — it is the same for all customers at that bank.
- You need your routing number plus your account number together when setting up direct deposit, wire transfers, or automatic bill payments.
- The routing number is public information and is safe to share; it does not give anyone access to your money on its own.
How to read the numbers on the bottom of a check
The bottom of a check contains three separate pieces of information, printed in a specific order from left to right. The first nine digits are your routing number. After that comes your account number, which is usually longer. At the far right is the check number itself.
The routing number uses a special magnetic ink and font so that check-processing machines can read it automatically. When you write a check, the bank that receives it scans this routing number to figure out which bank to send the money to.
If the numbers are hard to read on your check, you can verify them by logging into your online banking account. Most banks display both numbers in the account details section.
Finding your routing number without a check
Log into your bank's website or open the mobile app and look for account details, account information, or account summary. Most banks display the routing number alongside your account number in one place. Some banks put it under a section called "Bank Details" or "Account Numbers."
If you cannot find it online, call the customer service number on the back of your debit card. Have your account number ready, and the representative can give you the routing number in under a minute. You can also visit a branch in person, though this is slower than the other options.
Some banks print the routing number on statements or deposit slips as well, so check any paper documents your bank has sent you recently.
Why banks use routing numbers instead of just account numbers
The routing number tells the payment system which bank holds the account. Your account number tells that bank which specific account within their system is yours. Together, they form a complete address for your money.
Without routing numbers, the system would have no way to know whether an account number belonged to Bank of America, Wells Fargo, a credit union, or a small regional bank. Routing numbers sort payments to the right institution first, then the account number directs it to the right person.
This two-part system has been in place since the 1910s and remains the backbone of how money moves between banks in the United States.
When you need to provide your routing number
You need your routing number whenever you set up a payment that moves money between banks. This includes direct deposit from your employer, automatic bill payments to creditors or utilities, transfers from another bank, and wire transfers you initiate yourself.
You do not need it for everyday debit card purchases, ATM withdrawals, or transfers between accounts at the same bank. You also do not need it to receive a wire transfer into your account — the person sending the money needs it, not you.
If someone asks you for your routing number, they are setting up a way to pull money from your account or deposit money into it. Make sure you trust them and understand what payment you are authorizing.
The difference between routing number and SWIFT code
A routing number works only for payments within the United States. If you are sending or receiving money internationally, you need a SWIFT code instead, which is a different nine-character code that identifies your bank to the global payment system.
Some banks use the same nine digits for both, but they serve different purposes. A routing number moves money between U.S. banks. A SWIFT code moves money across borders. If you are setting up an international transfer, ask your bank which code to use — do not assume they are the same.
What happens if you give someone the wrong routing number
If you provide an incorrect routing number, the payment will either be rejected or sent to the wrong bank. The sending bank's system will try to match the routing number to a real institution. If it cannot, the transaction fails and the money returns to the sender.
If the routing number belongs to a real bank but not the one you use, the payment may sit in that bank's system for a few days before being returned. This causes a delay but does not result in permanent loss of the money.
Always double-check the routing number before you confirm a payment, especially for large amounts or one-time transfers. Mistakes are usually fixable, but they cost time.
Frequently Asked Questions
Is it safe to share my routing number?
Yes. Your routing number is public information — it is printed on every check you write and is not secret. Someone cannot access your account with only the routing number. They need both your routing number and your account number, and even then they can only move money if you have authorized them to do so.
Do I have the same routing number at every branch of my bank?
Yes. The routing number identifies the bank itself, not the individual branch. All branches of the same bank share one routing number. If you have multiple accounts at the same bank, they all use the same routing number but have different account numbers.
What if my bank merged with another bank?
After a merger, your routing number may change. Your bank will notify you and update your account information. If you have automatic payments or direct deposit set up, contact those organizations to provide the new routing number. Your old routing number will not work for new transactions.
Can I find someone else's routing number?
Yes, if you know which bank they use. Routing numbers are public. You can search online for "[Bank Name] routing number" and find it. However, you still need their account number to send them money, and they must have authorized you to do so.
Does the routing number change if I move to a different state?
No. Your routing number is tied to your bank, not your location. If you move and keep the same bank account, your routing number stays the same. If you switch to a different bank, you get a new routing number.