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Twilio is a cloud communications platform that enables developers to build, scale, and operate real-time communications within their software applications. It provides APIs for SMS, voice, video, and other communication channels, making it a versatile tool for integrating communication capabilities into applications.
When working with Twilio's SMS API, you might encounter the error code 21606. This error typically manifests when attempting to send an SMS message, and the operation fails with a message indicating that the 'From' number is not valid or SMS-capable.
Error 21606 is triggered when the 'From' number specified in your API request is not a valid, SMS-capable number. This means that the number either does not belong to Twilio or is not configured to send SMS messages. Twilio requires that the 'From' number be a Twilio number that supports SMS to ensure compliance and proper message routing.
The primary reason for this error is using a number that is not provisioned by Twilio or one that does not have SMS capabilities. This can happen if the number is a voice-only number or if it is not owned by your Twilio account.
To resolve this issue, follow these steps:
{
"From": "+1234567890", // Replace with your Twilio number
"To": "+0987654321",
"Body": "Hello, this is a test message!"
}
By ensuring that your 'From' number is a valid, SMS-capable Twilio number, you can effectively resolve Error 21606 and ensure smooth SMS communication through your application. For more detailed information, refer to the Twilio SMS Documentation.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)