Checking account numbers must be 11 digits.Drafts cannot be established with the Credit Union. Electronic drafts / debits must be established with the payee.Drafts may debit a checking account only.Sample Checking Account Number: 12345678.SECU ABA Routing Transit Number: 253177049.SECU is the second largest natural member credit union in the United States, both in asset size and in membership. SECU is a state chartered credit union headquartered in Raleigh, North Carolina regulated under the authority of the Credit Union Division of the NC Department of Commerce. State Employees' Credit Union is also popularly known as SECU.