Error: Twilio Error Code 30003

What's Causing This Error?

Twilio error code 30003 means your message failed to deliver because the destination was unavailable or unreachable. This error occurs if you are trying to reach an unreachable or switched-off destination handset.

Solution - Here's How To Resolve It

You can send another message via a REST API request to the user to determine whether this error occurs again and again. You can also use the API Explorer in the console instead of a REST API request.

If the error code occurs repeatedly:

• Check whether the destination device is on.
• Check whether other devices with the same mobile carrier can receive the message.
• Determine whether the destination device has enough signal.
• Check the Twilio Status Page and determine whether an active incident results in the error.
• Check whether the destination device is connected to the home carrier's network.
• Determine whether the device is capable of receiving non-Twilio SMS.
• Determine whether the device can receive messages with a shorter one-segment body (non-concatenated) or from any other Twilio number (non-Alphanumeric sender ID).

If the error prevails even after resolving all the above checklist points, try using the Fallback to Long Code feature of Messaging CoPilot because the message sent from shortcodes can cause an error if the destination user uses a wireless plan that doesn't support shortcode.

If none of the solutions work, you can open a Twilio support request after collecting three or more message SIDs from the last 24 hours in the SMS logs.