### Answer
To enable international calling for your Retell AI agents, you'll need to configure geographic permissions with your telephony provider. Here's how to do it with Twilio:
1. Search "geo" in your Twilio console to find the
Voice Geographic Permissions setting [(1) ](
)
2. Choose
Elastic SIP Trunking in the selector
3. Select the countries you would like to dial
This configuration is done on the telephony provider side (Twilio, Telnyx, Vonage, etc.) rather than directly in Retell AI. Once you've enabled the geographic permissions for your desired countries in your SIP trunk provider, your Retell agents will be able to make outbound calls to those international destinations.
If you're using a different telephony provider like Vonage or Telnyx, you'll need to check their respective dashboards for similar geographic/international calling permission settings.
For more details on setting up SIP trunking with various providers, check out:
- [Custom Telephony Overview](
)
- [Twilio Setup Guide](
)
- [Vonage Setup Guide](
)