What you get back from GET is a HTTP::Response object. From it you can detect if you got a redirect with the is_redirect() method and the host of the responder with the base() method.
Since HTTP::Response inherits from HTTP::Message, the methods and data of that class are also available. That includes a HTTP::Headers object available through the headers() method.
I have no idea whether "www.booble.com" routing techniques leave traces of that kind, but it's the information that you have available right now. See perldoc of those parent and agglomerate modules for more about the info your responses carry.