First National Bank of Northern California, Sunnyvale Branch Basic Info Reviews Routing Numbers Map & Direction Name: First National Bank of Northern California, Sunnyvale Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 425 S. Mathilda Ave Sunnyvale, California 94086 Santa Clara County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121031673YN121038634YN121101189YY121405209YN From: To: