I understand your frustration with this issue. Based on the information I've found, it appears that your setup may not work directly with Vapi due to international number restrictions.
According to our documentation, Vapi primarily supports US numbers, and "Vapi-provided numbers can only make calls to US/Canada regions" [](
https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341662322359533589). The error message you're seeing aligns with this limitation.
While you can import global numbers, there are still restrictions on making international calls. One potential workaround might be SIP trunking, which would require checking with your telephony provider for support.
I've escalated your query to our support team for a definitive answer on whether your specific setup (Netherlands number calling Belgian clients) can work with Vapi, and if so, what configuration would be needed. A support specialist will get back to you with more detailed information.
Thanks for your patience! 🙂