Past incident

SMS Delivery Delays and Failures from a Subset of Twilio Alphanumeric Sender IDs to Mobile China

SendGrid · Minor · Started

Duration
Unavailable
Severity
Minor
Status
No longer listed as active

Summary

Minor · No longer listed as active

We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.

View official incident ↗

Event timeline

How this incident unfolded, from the official status page.

  1. Investigating

    SendGrid

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender IDs to China Mobile network subscribers in China. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

  2. Identified

    SendGrid

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender IDs to China Mobile network subscribers in China. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

  3. Identified

    SendGrid

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender Type to Mobile network subscribers in China. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

  4. Identified

    SendGrid

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender Type to China Mobile network subscribers in China. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

  5. Identified

    SendGrid

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender Type to Mobile network subscribers in China. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

  6. Monitoring

    SendGrid

    We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.