SMS Delivery Delays and Failures to AT&T Network in the US for a Subset of 10 Digit Long Codes

Incident Report for Twilio

Resolved

We are no longer experiencing SMS delivery delays and failures to AT&T network in the US for a subset of 10 digit long codes. This incident has been resolved.

Posted Oct 20, 2025 - 14:35 PDT

Update

We continue to observe successful SMS delivery to AT&T network in the US for a subset of 10 digit long codes. 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 Oct 20, 2025 - 12:33 PDT

Monitoring

We are observing successful SMS delivery to AT&T Network in the US for a Subset of 10 Digit Long Codes. 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 Oct 20, 2025 - 10:35 PDT

Update

We have identified that this incident is also causing failures on the delivery of SMS to AT&T Network in the US for a subset of 10Digit Long code. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

Posted Oct 20, 2025 - 09:28 PDT

Update

We are still experiencing SMS delivery delays when sending messages to AT&T US Network Via a Subset Of 10 DLC Long code. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

Posted Oct 20, 2025 - 08:55 PDT

Investigating

We are experiencing SMS delivery delays when sending messages to AT&T US Network Via a Subset Of 10 DLC Long code. 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 Oct 20, 2025 - 07:59 PDT

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