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

This specific CoreESIM plan is designed for use exclusively within Belgium (or, if a broader regional plan, it would specify EU-wide coverage). For travelers venturing into neighboring countries such as the Netherlands (e.g., Amsterdam), France (e.g., Paris), or Germany (e.g., Cologne), a separate regional EU eSIM or a specific country eSIM would be required to maintain connectivity. Verify your plan's geographic scope before international transit.