Question
How can a customer with strict network policies ensure they’re able to use Twilio services by whitelisting necessary domains?
Product
Twilio (except SendGrid)
Answer
Customers with restrictive network policies can ensure seamless use of Twilio services by whitelisting specific domains. Here is a comprehensive list:
- *.twilio.com: Handles most requests, including interactions with the Flex UI.
- *.ytica.com: Supports Flex Insights functionality.
- *.twiliocdn.com: Provides static assets like SDKs and media files.
- *.twil.io: Associated with Twilio Functions / Serverless services.
- *.authy.com: Used for Twilio's Authy services.
- *.amazonaws.com: Utilized for various Twilio offerings hosted on AWS.
Whitelisting all subdomains of these domains is recommended to accommodate future updates or new features.
Please check our Requirements for Connecting to the Twilio REST API and Troubleshooting Common Issues guide for further information.
Additional Information
For additional assistance in troubleshooting connection issues to our Twilio Services, please contact Twilio Customer Support.