A routing number, also known as an ABA number, is a nine-digit code used to identify your Summit account during transactions, like deposits and transfers. You can easily access your account's routing number in a few different locations. All Summit personal accounts have the same routing number. You can also locate this routing number in online banking, the mobile app or at the bottom left of your checks (listed before your account number). Summit business accounts have different routing numbers. You can easily access your account's routing number in online banking or at the bottom left of your checks (listed before your account number). We're happy to help! Reach out to us at 800-236-5560.