More actionable error codes for A2P 10DLC Campaign registrations

Starting March 23, 2026, we’ll begin rolling out more specific and detailed error codes for US A2P 10DLC Campaign registraions.

These new codes are designed to give you clearer, more actionable feedback when a campaign is rejected or requires an edit - helping you resolve compliance issues faster and get your messaging live.

The existing error codes will still be supported, but these new granular codes provide the specific context needed for rapid troubleshooting.

What’s changing?
Currently, A2P 10DLC rejection messages can sometimes be broad, making it difficult to identify the exact compliance blocker. With this update, you’ll see granular error codes that pinpoint the specific reason. 

These new codes will appear in:

• API Responses
• Event Streams
• Twilio Console (Campaign Details Page)

What this means for you
If you have built custom logic or processes to handle A2P 10DLC registration errors, we recommend reviewing your error mapping.

Updating your tools to reflect these new, specific codes will allow your end-customers and operations teams to respond to rejections with much higher precision.

For a full list of the new codes and their meanings, please refer to the Support Article on Campaign Rejections.