What is Twilio Error 30034?

Error 30034 is the Twilio error "US A2P 10DLC: Message from an Unregistered Number". Twilio blocks messages to US numbers when the sender is a +1 10DLC number that is not linked to an approved A2P 10DLC campaign.

Common causes

• The brand or campaign registration is not complete.
• The number is not in the sender pool of the Messaging Service that is linked to the approved campaign.
• More than one 10DLC number was added to a sole proprietor campaign. Only one number can be registered for that campaign type.

How to fix it

1. Complete A2P 10DLC registration for the brand and the campaign before you send to US numbers.
2. Add the number to the sender pool of the Messaging Service for the approved campaign.
3. Check the registration status of the number.
4. If you must send before registration is complete, use a sender that is not part of 10DLC, such as a toll-free number or a short code.

Registration rules change during the year. See A2P 10DLC news for the current requirements.