Union Bank Online Banking Union Bank started in 1864 in California under the name The Bank of California. It is currently headquartered in New York and is now owned by The Bank of Tokyo-Mitsubishi UFJ, a big Japanese holding corporation. It operates over 300 branches in California, Oregon, and Washington. • Website – www.unionbank.com • Customer Service Telephone – 1(800)238-4486 • Routing Number – 122000496 (California) • Swift Number – BOFCUS33MPK Customer Service Telephone 1(800)238-4486 Online Banking Login How to…