----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [List Phone Numbers]() * [Import Vonage Number]() * [Function Calling]() * [Get Phone Number]() -----------------------------

### Answer It sounds like there might be an issue with the precedence of server URL settings in your configuration. When you set server URLs for different levels (organization-wide, assistant-specific, phone number-specific), Vapi has a defined precedence order which determines which URL is used for incoming requests. According to Vapi's documentation, the order of precedence from highest to lowest is: 1. Function-specific server URL 2. Assistant-specific server URL 3. Phone number-specific server URL 4. Organization-wide server URL Since you mentioned that setting the organization-wide server URL works, but the phone-specific does not, it's possible that another setting at a higher precedence level (like an assistant-specific server URL) might be overriding your phone-specific setting. To resolve this, ensure that no higher precedence server URLs are set that could be overriding your phone-specific URL. Also, double-check the server URL settings at the phone number level to make sure they are correctly configured and there are no errors in the URL itself [(1)]() . If you continue to face issues, reviewing your configuration for any other overriding settings at different levels might be necessary.

@Sahil any thoughts?