A2P 10DLC Campaign Vetting Delays: Twilio cannot approve 10DLC Campaigns ourselves, and must rely on third parties who control our connections to carriers to sign off. These external processes are creating several week delays for our customers. We continue to escalate these issues and are working to reduce delays wherever possible. Further details will be shared in the Campaign Vetting Changes article as they become available.

What happens when I attempt to send messages to a landline?

Currently the behavior is dependent on the location of the recipient.

When sending a message to a landline number in the US, Canada and the UK:

Twilio will not check whether the number is a landline and will attempt to send it to our carrier for delivery. Some carriers (especially the ones in the UK) will convert the SMS into text-to-speech messages via voice calls.

When sending a message to a landline number in other countries:

The Twilio REST API will throw the error below, and the message will not appear in the logs and your project will not be charged.

"code": 21614, "message": "To number: +86XXXXXXX, is not a mobile number", "more_info": "https://www.twilio.com/docs/errors/21614", "status": 400

Note: If you are attempting to send messages to Twilio SMS-capable geographic numbers, Twilio would allow you to do so.

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