What Is a Routing Number? A routing number is a string of nine digits intended to identify a financial institution during a transaction. You may also hear routing numbers referred to as ABA numbers.

In today’s world of electronic banking, knowing how to find your bank’s routing number is important. You need this number along with your account number or check number for things like: The routing ...

Your account number is located at the bottom of a check — it’s the second set of numbers, between the nine-digit routing number and the check number. The routing number comes first — it’s the ...