What is chase customer service number? Chase Customer Service Number. And the user can contact at any time. Toll-free number of Chase Customer Service Number: 1-800-935-9935 24 Hours, 7 Days – the technicians are said to be available. Please feel free to contact. As such one can call chase bank customer service on anytime as per their need.What are chase customer service hours? Chase Online Banking: (check balance) 1-877-242-7372 (24/7) Chase Bank Customer Service 1-800 Number: 1-800-935-9935. Phone Hours: 24 Hours, 7 Days. Average Wait: 11 minutes.Does chase offer chat? Contacting Chase. While Chase does not offer live chat, they do have a phone number. In total, there are 6 ways to get in touch with them. The best phone number for Chase is their 800-935-9935 customer service phone number, and you can get the details and use our free call-back service by finding the link for it above and clicking it.How do you contact chase bank? To contact Chase, start by calling their main customer service line 877-242-7372. To call Chase regarding your Credit Card – in US dial 800-524-3880. You will be asked last 4 digits of your credit card number, and billing Zip Code (by voice prompt).