Quiznos is located at 1975 Diamond Blvd # D150, Concord, CA. This business specializes in Restaurants. Quiznos is open Mon, 10am-8pm; Tue, 10am-8pm; Wed, 10am-8pm; Thu, 10am-8pm; Fri, 10am-8pm; Sat, 10am-8pm; Sun, 11am-7pm and accepts All Major Credit Cards, American Express, Cash, Diners Club, Discover, Mastercard and Visa.