SMS Delivery Failures to US Cellular Network

Incident Report for Twilio

Resolved

We are no longer experiencing SMS delivery failures when sending messages to US Cellular Network for subset of Twilio short codes. This incident has been resolved.

Posted Apr 29, 2022 - 15:45 PDT

Monitoring

We are observing recovery in SMS delivery when sending messages to US Cellular Network for affected subset of Twilio short 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 Apr 29, 2022 - 13:45 PDT

Update

We are still experiencing SMS delivery failures when sending to US Cellular network for a subset of Twilio short codes. Our engineers are working with our carrier partner to resolve the issue. We expect to provide another update in 2 hours or as soon as more information becomes available.

Posted Apr 29, 2022 - 11:45 PDT

Update

We are experiencing SMS delivery failures when sending to US Cellular network for a subset of Twilio short codes. Our engineers are 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 Apr 29, 2022 - 10:53 PDT

Investigating

Our monitoring systems have detected a potential issue with SMS delivery failures to US Cellular Corp for a small subset of Twilio customers. Our engineering team has been alerted and is actively investigating. We will update as soon as we have more information.

Posted Apr 29, 2022 - 10:47 PDT

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