Yes, sourdough bread can be frozen. Freezing sourdough bread is a convenient way to extend its shelf life and preserve its freshness. Before freezing, it is best to slice the bread if desired and wrap it tightly in plastic wrap or aluminum foil to prevent freezer burn. Alternatively, you can place the whole loaf in a freezer bag. When ready to use, thaw the bread at room temperature or heat it in the oven for a few minutes to restore its texture and flavor. However, keep in mind that freezing and thawing may slightly alter the texture of sourdough bread, but it can still be enjoyed once thawed.