Zions Bancorporation, Na, 314 W Route 66, Williams, AZ 86046, US

For more than 25 years, National Bank of Arizona is one of nation's leading financial firms serving clients throughout the United States. Based in Williams, Ariz., the bank caters to individual, commercial, corporate and small businesses. Its array of products includes checking and savings account, personal credit and vehicle/mortgage loans. National Bank of Arizona also carries a host of wealth management services as well as internet banking and bill payment facility. The bank was awarded the "Best Bank" by Readers Choice and "Excellence in Banking" by Greenwich Association.