Preheat oven to 425 degrees. Spray a 9 inch baking dish with non-stick spray. Set aside.
To the bowl of a stand mixer fitted with the paddle attachment, add the cream cheese, mayonnaise, and sour cream. Beat on medium speed until smooth and combined, scraping the sides of the bowl as needed. Remove the bowl from the stand mixer and fold in the artichoke hearts and crab meat using a rubber spatula. Add 1/2 cup of the fontina cheese, the pepper jack, green onions, lemon zest, Worcestershire sauce, and Old Bay. Stir until well combined. Season with salt and pepper to taste.
Spread the dip evenly into the prepared baking dish. Bake for 25 minutes or until melted, bubbly, and golden brown on top. Serve immediately with toasted bread, crackers, or corn chips.