SEFCU Credit Union Online Banking SEFCU Bank is a credit union founded in 1934 New York where it is still headquartered. It operates 46 branches in the greater upstate New York area (Capital Region, Binghamton, Syracuse, Buffalo). Currently, it is one of the top 50 largest credit unions in the states. • Website – www.sefcu.com • Customer Service Telephone – 1(800)-727-3328 • Routing Number – 221373383 SEFCU Bank is not part of any SWIFT network. Customer Service Telephone 1(800)-727-3328 Online…