SMS Delivery Delays from Shortcodes to Multiple US Networks

Incident Report for Twilio

Resolved

Issues with SMS delivery delays when sending messages to multiple US networks has been resolved and SMS is operating normally at this time.

Posted May 04, 2021 - 08:33 PDT

Update

We continue to observe recovery in SMS delivery delays when sending messages to multiple US networks over a very small subset of short codes. We are continuing to monitor the service to ensure a full recovery. We will provide another update in 2 hours or as soon as more information becomes available.

Posted May 04, 2021 - 07:20 PDT

Update

Posted May 04, 2021 - 05:30 PDT

Monitoring

We are observing recovery in SMS delivery delays when sending messages to multiple US networks over a very small subset of short codes. We will continue monitoring the service to ensure a full recovery. We will provide another update in 2 hours or as soon as more information becomes available.

Posted May 04, 2021 - 03:30 PDT

Update

We are continuing to work with our carrier partner to resolve SMS delivery delays when sending messages to multiple US networks over a very small subset of short codes. We expect to provide another update in 8 hours or as soon as more information becomes available.

Posted May 03, 2021 - 19:34 PDT

Update

We are continuing to work with our carrier partner to resolve SMS delivery delays when sending messages to multiple US networks over a very small subset of short codes. We expect to provide another update in 4 hours or as soon as more information becomes available.

Posted May 03, 2021 - 15:29 PDT

Update

We are continuing to work with our carrier partner to resolve SMS delivery delays when sending messages to multiple US networks over a very small subset of short codes. We expect to provide another update in 2 hours or as soon as more information becomes available.

Posted May 03, 2021 - 13:35 PDT

Identified

Upon further investigation, we identified that the SMS delivery delay issue is limited to a very small subset of short codes. SMS messages from affected short codes to multiple mobile networks could be delayed up to a couple of minutes. We have started observing recovery in the past hour, while the delivery report could still be delayed. We are actively working with our carrier partner to resolve the issue. We expect to provide another update in 1 hour or as soon as more information becomes available.

Posted May 03, 2021 - 12:28 PDT

Update

We are still experiencing SMS delivery delays when sending messages to multiple US networks. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

Posted May 03, 2021 - 10:15 PDT

Update

We are still experiencing SMS delivery delays when sending messages to multiple US networks. 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 May 03, 2021 - 08:16 PDT

Investigating

We are experiencing SMS delivery delays when sending messages to multiple US networks. 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 May 03, 2021 - 07:16 PDT

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