There are many kinds of breads/bread recipes and that can impact crust/baking temp or time. I don't think there is a single answer for every type of bread based on my experience baking various type of breads. Do you have a specific recipe that isn't working or are you trying to duplicate a recipe for something you have eaten?
For example, what you brush on the bread before baking (i.e. milk/butter/water/eggs) will impact how the crust turns out, regardless of the temperature or how long you bake it.