Is this eSIM valid for neighboring countries (Netherlands, France, Germany)?

 This specific plan is valid only within Belgium (or, if it's a regional plan, you'd say "Yes"). This is the most important question. Travelers almost always visit Amsterdam (Netherlands), Paris (France), or Cologne (Germany) on the same trip. Your connection will stop at the border. For a seamless multi-country trip, we highly recommend our Europe Regional eSIM, which covers Belgium and all its neighbors with one single plan.