[U.S. A2P 10DLC] Increased Filtering on Unregistered US 10DLC Numbers

Effective July 5, 2023, all SMS and MMS messages sent to U.S. phone numbers using +1 10DLC phone numbers must be sent via a registered application-to-person (A2P) campaign. Messages sent using unregistered +1 10DLC will be subject to a gradual increase of message blocking by Twilio, beginning on July 5, 2023, ultimately leading to a full block of all unregistered U.S.-bound messages sent after August 31, 2023. Blocked messages will return new error code 30034, “US A2P 10DLC - Message from an Unregistered Number”. Twilio messaging rates will still apply, even for blocked messages.

Please register your +1 10DLC numbers as soon as possible to avoid the impact. You may do so via the Twilio Console or APIs.

For more information, please check out our guide Shutdown of Unregistered 10DLC Messaging FAQ