Royal Business Bank ← View details #K,, 1241 Grand Avenue, Diamond Bar, CA 91765 +1 909-348-5188 royalbusinessbankusa.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 04:30 pm Tuesday: 09:00 am — 04:30 pm Wednesday: 09:00 am — 04:30 pm Thursday: 09:00 am — 04:30 pm Friday: 09:00 am — 06:00 pm Your comments * — Required information