Debug Your Infrastructure

Get Instant Solutions for Kubernetes, Databases, Docker and more

AWS CloudWatch
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Pod Stuck in CrashLoopBackOff
Database connection timeout
Docker Container won't Start
Kubernetes ingress not working
Redis connection refused
CI/CD pipeline failing

Twilio Error 21612

The 'From' phone number is not a valid, SMS-capable Twilio number.

Understanding Twilio and Its Purpose

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, allowing seamless integration into various applications. Twilio's SMS API is particularly popular for sending and receiving text messages globally.

Identifying the Symptom: Error 21612

When using Twilio's SMS API, you might encounter the error code 21612. This error typically manifests when attempting to send an SMS message, and it indicates a problem with the 'From' phone number used in the request.

Exploring the Issue: What is Error 21612?

Error 21612 occurs when the 'From' phone number specified in your API request is not a valid, SMS-capable Twilio number. Twilio requires that the 'From' number be one of your Twilio numbers that has SMS capabilities. This ensures that messages are sent from a verified and authorized source.

Why Does This Happen?

This error can occur if you mistakenly use a phone number that is not provisioned by Twilio or if the number does not have SMS capabilities enabled. It's crucial to verify that the number is both owned by your Twilio account and capable of sending SMS messages.

Steps to Fix Error 21612

To resolve this issue, follow these steps:

Step 1: Verify Your Twilio Numbers

Log in to your Twilio Console and navigate to the Phone Numbers section. Ensure that the number you intend to use is listed under your account and is marked as SMS-capable.

Step 2: Update Your API Request

In your API request, replace the 'From' number with a valid Twilio number. Here's an example of how your request should look:

{
"From": "+1234567890", // Replace with your Twilio number
"To": "+0987654321",
"Body": "Hello, this is a test message!"
}

Step 3: Test Your Configuration

After updating the 'From' number, send a test message to ensure that the error is resolved. You can use the Twilio Quickstart Guide for detailed instructions on sending SMS messages.

Additional Resources

For further assistance, refer to the Twilio Error Code Documentation and the Twilio SMS API Documentation for more information on sending messages and handling errors.

Master 

Twilio Error 21612

 debugging in Minutes

— Grab the Ultimate Cheatsheet

(Perfect for DevOps & SREs)

Most-used commands
Real-world configs/examples
Handy troubleshooting shortcuts
Your email is safe with us. No spam, ever.

Thankyou for your submission

We have sent the cheatsheet on your email!
Oops! Something went wrong while submitting the form.

Heading

Cheatsheet

(Perfect for DevOps & SREs)

Most-used commands
Your email is safe thing.

Thankyou for your submission

We have sent the cheatsheet on your email!
Oops! Something went wrong while submitting the form.

MORE ISSUES

Deep Sea Tech Inc. — Made with ❤️ in Bangalore & San Francisco 🏢

Doctor Droid