The routing number appears as the first set of numbers at the bottom left of a check. It’s always exactly nine digits long and is the same for all customers at your bank or credit union.

The other number is the number assigned to your checking account when you open the account. Here’s a look at how routing and account numbers work and how you can find them on a check.

Though a routing number is specific to your bank or credit union, an account number is specific to each account. Account numbers vary in length but typically only go up to 12 digits.

The check number is on the far right-hand side following the routing number and the account number. Each check has a different check number, and these numbers are generally sequential.

Again, the routing number for your checking account will be on the bottom left of the check. It’s located under the check’s “memo” line, where you write the purpose of the check.

Learn what a routing number on a check is, how to find it, and why it's crucial for banking transactions. Get the routing numbers of the biggest banks.

Learn where to find your account number on a check. We'll distinguish routing numbers, account numbers, and check numbers for convenience when banking.

A checking account number tells payment processors which account should receive the deposit or payment. Lastly, a check number specifies which check is being used for payment.

How to find your routing number on a check: You can find your routing number at the bottom left corner of your personal checks. It’s the first nine digits of the long line of numbers.

We see it every time we write a check, but we don’t think much about it — the bank’s routing number. It is the first set of numbers at the bottom of every check you write.