Routing Transit Information There are four types of numbers found on your checks. Below is a diagram that helps explain the meanings of these numbers. 1: Financial Institution Routing Transit Number – 9 numbers located between two symbols. This number identifies the bank holding your account and check processing center. 2: Account Number – This is your complete account number (excluding spaces and special characters). If you have more than one account, each account will have a separate number which may not be in sequence. Your personal SunTrust account number may be up to 13 digits. 3: ACH Routing Transit Number – 9 numbers used to set up automatic debits for payments and payroll direct deposits. This number reflects the electronic processing center for your account and may differ from your Financial Institution Routing Transit Number. 4: Check Number – Each time you write a check, even for an electronic payment by phone, you should use the next available number in sequence and be sure to record the necessary information in your checkbook.