As the (dead) sibling comment points out, my (non-lawyer) understanding of US copyright law is that simple collections of facts, when compiled in a way that req

As the (dead) sibling comment points out, my (non-lawyer) understanding of US copyright law is that simple collections of facts, when compiled in a way that requires no creativity, do not enjoy any copyright protection at all. I would be surprised if a simple list of addresses, even a very large one, is something that could be subject to copyright.