Debug Your Infrastructure
Get Instant Solutions for Kubernetes, Databases, Docker and more
Twilio Voice Error 13223: Invalid 'From' phone number.
Understanding Twilio Voice
Twilio Voice is a powerful API that allows developers to make, receive, and monitor calls programmatically. It is widely used in applications that require voice communication capabilities, such as customer service platforms, automated call systems, and more. By leveraging Twilio Voice, engineers can integrate voice functionalities into their applications with ease.
Identifying the Symptom
When working with Twilio Voice, you might encounter the error code 13223. This error typically manifests when you attempt to make a call using an invalid 'From' phone number. The error message will indicate that the 'From' number is not recognized as a valid Twilio number.
Explaining Error 13223
Error 13223 occurs when the 'From' number specified in your API request is not a valid Twilio number. This can happen if the number is not provisioned in your Twilio account or if there is a typo in the number format. Twilio requires that the 'From' number be one of your verified Twilio numbers to ensure compliance with telecommunication regulations.
Common Causes
- The 'From' number is not a Twilio number.
- There is a typo in the phone number format.
- The number has not been verified or provisioned in your Twilio account.
Steps to Resolve Error 13223
To resolve this issue, follow these steps:
Step 1: Verify Your Twilio Numbers
Log in to your Twilio account and navigate to the Phone Numbers section. Ensure that the 'From' number you are using is listed among your Twilio numbers. If it is not, you will need to purchase or verify a new number.
Step 2: Check the Number Format
Ensure that the 'From' number is formatted correctly. Twilio numbers should be in E.164 format, which includes the country code. For example, a US number should be formatted as +12345678900.
Step 3: Update Your API Request
Once you have verified the number, update your API request to use the correct 'From' number. Here is an example of how your API request might look:
{
"From": "+12345678900",
"To": "+10987654321",
"Url": "http://demo.twilio.com/docs/voice.xml"
}
Additional Resources
For more information on managing your Twilio numbers, visit the Twilio Phone Numbers Documentation. If you continue to experience issues, consider reaching out to Twilio Support for further assistance.
Master
Twilio Voice Error 13223: Invalid 'From' phone number.
debugging in Minutes
— Grab the Ultimate Cheatsheet
(Perfect for DevOps & SREs)
🚀 Tired of Noisy Alerts?
Try Doctor Droid — your AI SRE that auto-triages alerts, debugs issues, and finds the root cause for you.
Heading
MORE ISSUES
Backed by
