Key Bank is one of the highly recognised banks that is known to address financial needs of customers with innovative banking products and services. Checking, Savings & CDs, Loans & Mortgages, Credit Cards, Rewards, Investing & Insurance and other Banking Services are the serving areas of Key Bank. Furthermore, customer service representatives of Key Bank are available at round the clock assistance of customers, paying adequate attention to concerns and queries, and ensuring resolution in an effective manner. Key Bank customer service representatives can be reached out by the means of given customer service contact details: Key Bank Customer Service Phone Number: 1-800-539-2968 Key Bank Customer Service Email:  customerservice@key.com |  support@key.com Key Bank TDD/TTY Customer Service Number: 1-800-539-8336 Online and Mobile Banking:  1-800-539-1539 | Monday–Friday, 7:00 a.m.–Midnight ET; Saturday–Sunday, 8:00 a.m.–9:00 p.m. ET Lost or Stolen Cards: 1-800-539-9056