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Twilio Voice Error 13225

Invalid 'To' phone number.

Understanding Twilio Voice

Twilio Voice is a powerful API that enables developers to make and receive phone calls programmatically. It is widely used in applications that require voice communication, such as customer support systems, automated call centers, and interactive voice response (IVR) systems. The API provides a robust platform for integrating voice capabilities into applications, allowing for seamless communication and enhanced user experiences.

Identifying the Symptom: Error 13225

When working with Twilio Voice, you might encounter the error code 13225. This error typically manifests when attempting to initiate a call, and the process fails with a message indicating an invalid 'To' phone number. This can halt your application's ability to make outbound calls, affecting its functionality.

Exploring the Issue: Invalid 'To' Phone Number

Error 13225 is triggered when the phone number specified in the 'To' field of your API request is not recognized as valid. Twilio requires phone numbers to be in the E.164 format, which is an internationally recognized standard for phone numbers. This format includes the country code, area code, and the subscriber number, all prefixed with a '+' sign. For example, a valid E.164 number for the United States would look like +14155552671.

Steps to Resolve Error 13225

Step 1: Verify the Phone Number Format

Ensure that the 'To' phone number in your API request is formatted correctly. It should adhere to the E.164 standard. Double-check the number for any missing or extra characters, such as spaces or dashes, which are not allowed.

Step 2: Use Twilio's Lookup API

To confirm the validity of a phone number, you can use Twilio's Lookup API. This tool helps verify the number's format and provides additional information, such as the carrier and line type. Here's a sample cURL command to use the Lookup API:

curl -X GET 'https://lookups.twilio.com/v1/PhoneNumbers/+14155552671' \
--user 'ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:your_auth_token'

Step 3: Update Your Application Code

Once you've verified the correct format, update your application code to ensure that all phone numbers are stored and processed in the E.164 format. This might involve modifying your database entries or the logic that constructs phone numbers in your application.

Conclusion

By following these steps, you can resolve Error 13225 and ensure that your Twilio Voice application functions smoothly. Properly formatted phone numbers are crucial for successful call initiation, and leveraging Twilio's tools can help maintain the integrity of your application's communication capabilities. For further assistance, refer to the Twilio Voice documentation.

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