jrhenderson1988 said: Is there a way I can match any domain that is not my domain or a subdomain of my domain in this way?

Yes, don't use a domain filter on the last group. Since if it makes it that far it didn't match the other routes.

I need to be able to access the domain to do something with it afterwards too, just like I did with $subdomain.

You can get the requested url domain with,

Request::getHost() 

Thanks for your reply. That's what I'm doing at the moment. I was just hoping there was a way of doing it with a domain filter as it felt cleaner that way.

Thanks for the tip on Request::getHost(). I am currently using:

Request::server('HTTP_HOST');

I know this is really late, but there is a way to do it with a domain filter. By default Laravel applies a regexp to the filter that prevents you from passing any non-alphanumeric characters. You can override this in app/Providers/RouteServiceProvider.php in the boot method with something like:

public function boot(Router $router)
{
    $router->pattern('domain', '[a-z0-9.]+');
    parent::boot($router);
}

Now you can do dynamic full domain routing just like you would subdomains.