Intermittent Delivery of AT&T Mobile Originated SMS to Twilio Short Codes

Incident Report for Twilio

Resolved

We are no longer experiencing intermittent delivery failures from AT&T mobile handsets to a subset of Twilio short codes. If this issue returns, we will reach out to affected customers individually.

Posted Dec 29, 2021 - 10:46 PST

Monitoring

We have observed recovery on the intermittent delivery failures from AT&T mobile handsets to a subset of Twilio short codes for the last few days, and we are continuing to monitor. We will provide another update within 24 hours or as soon as more information becomes available.

Posted Dec 28, 2021 - 10:50 PST

Update

Our carrier partner has identified the issue causing intermittent delivery failures from AT&T mobile handsets to a subset of Twilio short codes. A plan to fix the issue is being worked on and we will provide another update within 24 hours or as soon as more information becomes available.

Posted Dec 28, 2021 - 10:20 PST

Update

Posted Dec 27, 2021 - 10:16 PST

Update

Posted Dec 26, 2021 - 10:16 PST

Update

Posted Dec 25, 2021 - 10:25 PST

Identified

Our carrier partner has identified the issue causing intermittent delivery failures from AT&T mobile handsets to a subset of Twilio short codes. A plan to fix the issue is being worked on, and we will provide another update in 24 hours or as soon as more information becomes available.

Posted Dec 24, 2021 - 10:25 PST

Update

We continue to work with our carrier partner to resolve the issue causing the intermittent delivery of AT&T mobile originated SMS to Twilio short codes. We will provide another update in 24 hours or as soon as more information becomes available.

Posted Dec 23, 2021 - 20:58 PST

Update

We continue to work with our carrier partner to resolve the issue causing the intermittent delivery of AT&T mobile originated SMS to Twilio short codes. We will provide another update in 16 hours or as soon as more information becomes available.

Posted Dec 23, 2021 - 04:58 PST

Update

We continue to work with our carrier partner to resolve the issue causing the intermittent delivery of AT&T mobile originated SMS to Twilio short codes. We will provide another update in 8 hours or as soon as more information becomes available.

Posted Dec 22, 2021 - 21:50 PST

Update

We are continuing to work with our carrier partner to resolve the issue causing intermittent delivery of AT&T mobile originated SMS to Twilio short codes. We expect to provide another update in 4 hours or as soon as more information becomes available.

Posted Dec 22, 2021 - 18:00 PST

Update

We are continuing to work with our carrier partner to resolve the issue causing intermittent delivery of AT&T mobile originated SMS to Twilio short codes. We expect to provide another update in 2 hours or as soon as more information becomes available.

Posted Dec 22, 2021 - 16:00 PST

Update

We are experiencing message failures to a subset of Twilio Short Code from AT&T originated messages in the US. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted Dec 22, 2021 - 15:00 PST

Investigating

Our monitoring systems have detected a potential issue with Intermittent AT&T Mobile Originated delivery issues towards short codes. Our engineering team has been alerted and is actively investigating. We will update as soon as we have more information.

Posted Dec 22, 2021 - 14:50 PST

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