Amegy Bank Amegy Bank is a division of Zions Bancorporation, N.A. (NASDAQ: ZION), one of the nation’s premier financial services companies, with total assets exceeding $65 billion. Zions Bancorporation, N.A. is a member of the Federal Deposit Insurance Corporation (FDIC), and operates under multiple trade names in multiple states. Divisions of Zions Bancorporation, N.A. are not separately FDIC‐insured banks. The FDIC coverage extended to deposit clients is that of one insured bank. Learn more. Amegy Bank Customer Service Telephone General…