SMS Delivery Failures to AT&T US via Subset of Twilio Short Codes

Incident Report for Twilio

Resolved

We are no longer experiencing SMS delivery failures to the US on the AT&T. This incident has been resolved.

Posted Nov 10, 2021 - 18:46 PST

Monitoring

We are observing successful SMS delivery to the US on the AT&T network. We will continue to monitor to ensure full service recovery. We expect to provide another update in 2 hours or as soon as more information becomes available.

Posted Nov 10, 2021 - 17:46 PST

Update

We are investigating SMS delivery failures to the AT&T network in the US via a subset of Twilio short codes. We expect to provide another update in 1 hour or as soon as more information becomes available.

Posted Nov 10, 2021 - 17:03 PST

Investigating

Our monitoring systems have detected a potential issue with increased 30,008 error codes being triggered for short code messaging to AT&T in the US. Our engineering team has been alerted and is actively investigating. We will update as soon as we have more information.

Posted Nov 10, 2021 - 16:53 PST

This incident affected: CARRIER NETWORK (SMS Short Code, North America).