Get Instant Solutions for Kubernetes, Databases, Docker and more
Twilio is a cloud communications platform that enables developers to programmatically send and receive messages, make and receive phone calls, and perform other communication functions using its web service APIs. It is widely used for integrating SMS, voice, and video capabilities into applications, providing a seamless communication experience.
When using Twilio's SMS API, you might encounter the error code 21412. This error typically manifests when attempting to send an SMS message, and the operation fails with a message indicating an issue with the 'From' phone number.
Error 21412 occurs when the 'From' phone number specified in your API request is not a valid short code. Short codes are special telephone numbers, significantly shorter than full phone numbers, used to send SMS and MMS messages.
The primary cause of Error 21412 is the use of an invalid or incorrect short code in the 'From' field of your API request. This can happen if the short code is not provisioned for your account or if there is a typo in the number.
Short codes are essential for high-volume messaging and are often used for marketing campaigns, alerts, and notifications. They must be provisioned and approved for use with your Twilio account to ensure compliance with carrier regulations.
To fix this issue, follow these steps:
By ensuring that you use a valid and active short code in your Twilio API requests, you can effectively resolve Error 21412 and continue leveraging Twilio's powerful communication capabilities in your applications. For more detailed guidance, always refer to the official Twilio Documentation.
(Perfect for DevOps & SREs)
Try Doctor Droid — your AI SRE that auto-triages alerts, debugs issues, and finds the root cause for you.